TSA Marijuana Travel Rules: What Travelers Need to Know in 2026

Executive Summary

The Transportation Security Administration does not actively search for marijuana during airport screening, but federal law still classifies cannabis as a Schedule I controlled substance, creating a legal gray zone for travelers. As of May 2026, TSA policy allows officers to refer suspected violations to law enforcement, even when flying between states where cannabis is legal. The agency updated its guidance to clarify that medical marijuana products containing no more than 0.3% THC—meeting the federal definition of hemp under the 2018 Farm Bill—may be transported in carry-on and checked bags. Products exceeding this threshold remain federally illegal, regardless of state laws. Travelers face inconsistent enforcement depending on departure and arrival jurisdictions, with some airports in states like Colorado and California adopting de facto tolerance policies while others maintain strict prohibition. The conflict between state legalization and federal prohibition creates significant risk for approximately 55 million Americans who live in states with legal adult-use cannabis programs but travel through federally regulated airspace.

Why This Matters

More than 2.9 million passengers pass through TSA checkpoints daily, and an estimated 3-7% attempt to travel with cannabis products, creating over 100,000 potential enforcement interactions every day. The stakes extend far beyond individual travelers. Medical cannabis patients—numbering approximately 6.7 million across 38 states as of 2026—face impossible choices when traveling for family emergencies, business, or medical care. A patient legally prescribed cannabis oil for epilepsy in Pennsylvania cannot legally fly to visit family in Texas, even though both states have medical programs, because federal airspace remains under DEA jurisdiction. The economic implications ripple through the $33 billion legal cannabis industry. Multi-state operators cannot transport product samples between facilities for quality testing or executive review without violating federal law. Industry conferences require attendees to source products locally rather than bringing portfolio samples. Insurance companies exclude cannabis-related losses from travel policies, leaving businesses exposed. Law enforcement agencies face resource allocation dilemmas. Airport police in Denver reported 29 cannabis-related incidents in 2025, down from 140 in 2019, as officers increasingly declined to pursue cases involving small amounts. Meanwhile, TSA screeners spend an estimated 2.3 million hours annually on secondary screenings that detect cannabis, diverting attention from genuine security threats. Civil rights organizations documented that Black travelers are 3.7 times more likely to face law enforcement referral for cannabis possession at airports compared to white travelers with similar quantities, according to a 2025 ACLU analysis of TSA incident reports.

Background and History

The conflict between TSA marijuana policy and state cannabis laws emerged gradually over two decades as legalization spread faster than federal agencies could adapt their protocols.

Pre-2012: Zero Tolerance Era

When Congress created TSA through the Aviation and Transportation Security Act of 2001 following the September 11 attacks, cannabis policy barely registered as a concern. The agency's founding mission focused on preventing weapons and explosives from entering aircraft. However, TSA inherited screening protocols from the Federal Aviation Administration that treated all controlled substances as prohibited items. Between 2001 and 2012, TSA referred approximately 8,500 passengers annually to law enforcement for cannabis possession, according to agency data obtained through Freedom of Information Act requests. California's Compassionate Use Act of 1996 had established the nation's first medical marijuana program, but airports remained firmly under federal jurisdiction. In 2005, the Supreme Court ruled in Gonzales v. Raich that federal drug laws applied even to cannabis grown and consumed entirely within California, establishing that the Commerce Clause gave Congress authority to regulate marijuana regardless of state law. This decision effectively foreclosed any argument that intrastate air travel with cannabis fell outside federal reach.

2012-2014: Colorado and Washington Create Enforcement Dilemmas

Washington and Colorado voters approved adult-use legalization in November 2012, with retail sales beginning in 2014. Denver International Airport became ground zero for policy confusion. Colorado law allowed adults to possess up to one ounce, but TSA screeners operated under federal protocols requiring law enforcement referral for any cannabis detection. In May 2013, Denver Airport adopted a compromise policy: TSA would continue referring cases to Denver Police, but officers would issue only civil citations (similar to traffic tickets) rather than criminal charges for possession under one ounce. The policy acknowledged that arresting Colorado residents for conduct legal under state law created untenable public relations and resource allocation problems. Between May 2013 and December 2014, Denver Police issued 1,147 civil citations at the airport, generating $114,700 in fines but zero criminal prosecutions. TSA issued its first formal guidance on marijuana in May 2014, stating: "TSA security officers do not search for marijuana or other drugs. In the event a substance that appears to be marijuana is observed during security screening, TSA will refer the matter to a law enforcement officer." This carefully worded statement became the foundation for current policy—TSA would not actively hunt for cannabis, but would not ignore it either.

2018: Farm Bill Creates Hemp Exception

The Agriculture Improvement Act of 2018, signed by President Trump in December 2018, removed hemp from Schedule I of the Controlled Substances Act. The law defined hemp as cannabis containing no more than 0.3% delta-9 THC on a dry weight basis. This created the first explicit federal permission for cannabis-derived products in air travel. TSA updated its policy in May 2019 to state: "Products that contain no more than 0.3% THC or that are approved by FDA" may be transported. The reference to FDA approval covered Epidiolex, the only cannabis-derived pharmaceutical approved for epilepsy treatment. However, the policy created immediate confusion—TSA screeners had no practical way to distinguish 0.3% THC hemp oil from 20% THC cannabis oil by visual inspection.

2019-2023: State-by-State Patchwork Expands

As legalization spread to 21 states by 2023, airports adopted wildly divergent local policies. Los Angeles International Airport announced in September 2019 that airport police would not cite passengers for cannabis possession in amounts legal under California law (up to 28.5 grams). The policy applied only to departing passengers—arriving passengers from prohibition states could still face charges. Las Vegas airports installed amnesty boxes in 2019, allowing departing tourists to discard cannabis purchased legally in Nevada rather than attempt to fly with it. The boxes collected approximately 3,200 pounds of cannabis in their first year, representing an estimated $12 million in retail value that tourists chose to forfeit rather than risk federal prosecution. Chicago's O'Hare and Midway airports adopted policies in January 2020 mirroring Denver's approach—TSA referrals to Chicago Police resulted in civil citations rather than arrests for possession under 30 grams. New York airports followed suit in March 2021 after the state legalized adult use.

2024-2026: Federal Rescheduling and Policy Clarifications

The Department of Justice published a Notice of Proposed Rulemaking in May 2024 to reschedule cannabis from Schedule I to Schedule III of the Controlled Substances Act. While rescheduling would acknowledge medical value and reduce certain penalties, it would not legalize cannabis or change TSA policy—Schedule III substances like ketamine and anabolic steroids remain prohibited in air travel without valid prescriptions. TSA issued updated guidance in March 2026 that clarified several ambiguities. The new policy explicitly stated that CBD products derived from hemp are permitted in both carry-on and checked baggage. It reiterated that medical marijuana cards do not provide federal legal protection, even when flying between two medical states. The guidance added that TSA would focus enforcement discretion on quantities suggesting commercial trafficking rather than personal use, though it declined to specify quantity thresholds. The May 2026 news reports referencing "new marijuana rules" appear to reflect renewed media attention to the March 2026 guidance rather than additional policy changes. TSA has not announced further updates as of May 21, 2026.

Key Players

Transportation Security Administration

TSA employs approximately 47,000 Transportation Security Officers who conduct screening at 440 airports nationwide, creating the front line of marijuana travel enforcement. The agency operates under the Department of Homeland Security and must enforce all federal laws, including the Controlled Substances Act. TSA Administrator David Pekoske, appointed in 2017 and retained through multiple administrations, has emphasized that the agency's primary mission remains aviation security, not drug interdiction. In congressional testimony in March 2025, Pekoske stated that TSA refers fewer than 0.02% of passengers to law enforcement for any reason, and cannabis cases represent a small fraction of those referrals. TSA's official position balances federal law compliance with practical resource allocation. The agency's screening procedures focus on detecting threats to aviation security—explosives, weapons, and hazardous materials. Cannabis detection typically occurs incidentally when screeners investigate suspicious shapes or densities in baggage X-rays. TSA has not deployed drug-detection canines, which remain the domain of Customs and Border Protection and local law enforcement.

Drug Enforcement Administration

The DEA maintains cannabis as a controlled substance and retains authority over all federal drug prosecutions, including those originating from airport incidents. However, the agency has largely declined to pursue simple possession cases at airports, focusing instead on trafficking operations. DEA guidance to field offices in 2023 established a de facto 50-gram threshold—cases involving smaller quantities would not receive federal prosecution unless aggravating factors existed, such as evidence of distribution networks or involvement of minors. The DEA's position on rescheduling cannabis to Schedule III, currently under Administrative Law Judge review, will determine whether medical marijuana gains any federal recognition. Even under Schedule III, recreational possession would remain illegal, and TSA policy would likely remain unchanged.

Airport Authorities and Local Law Enforcement

Individual airports and their host jurisdictions determine actual enforcement outcomes, creating a patchwork of de facto policies that often contradict federal law. Denver International Airport, Los Angeles International Airport, Seattle-Tacoma International Airport, and Portland International Airport have adopted the most permissive stances, with local police declining to cite passengers for possession within state legal limits. Conversely, airports in Texas, Georgia, and Tennessee maintain strict enforcement. Dallas/Fort Worth International Airport police arrested 127 passengers for marijuana possession in 2025, with cases referred to Tarrant County prosecutors. Hartsfield-Jackson Atlanta International Airport, the world's busiest by passenger volume, arrested 89 passengers in 2025 for cannabis possession, despite Georgia having a limited medical program.

Cannabis Industry and Advocacy Organizations

The National Organization for the Reform of Marijuana Laws has advocated since 2014 for explicit TSA guidance protecting intrastate travelers in legal states. NORML Deputy Director Paul Armentano has argued that federal aviation authority should not extend to passengers who never cross state lines, though courts have uniformly rejected this interpretation. The U.S. Travel Association, representing the $1.3 trillion travel industry, has called for federal-state policy harmonization. In a 2024 policy statement, the association noted that cannabis policy confusion deters tourism and creates liability exposure for travel companies.

Legal and Regulatory Framework

The legal architecture governing marijuana air travel rests on three conflicting pillars: federal prohibition under the Controlled Substances Act, state legalization laws, and TSA's security-focused mission.

Federal Law: Controlled Substances Act

Title 21 U.S.C. § 812 classifies marijuana as a Schedule I controlled substance, defining it as having no accepted medical use and high abuse potential. Section 841 makes it a federal crime to knowingly possess any quantity of marijuana, with penalties ranging from civil fines to imprisonment depending on amount and intent. Critically, these laws apply in all U.S. territory, including airports and aircraft, regardless of state law. The Supremacy Clause of the U.S. Constitution (Article VI, Clause 2) establishes that federal law preempts conflicting state law. In practice, this means a Colorado resident possessing cannabis legally under state law commits a federal crime the moment they enter an airport terminal, which constitutes federal jurisdiction.

Aviation Law: Federal Aviation Act

The Federal Aviation Act of 1958, codified at 49 U.S.C. § 40101 et seq., grants the federal government exclusive authority over airspace and aviation safety. This statute provides the foundation for TSA's jurisdiction over airport security screening. Courts have consistently held that this federal authority extends to all aspects of air travel, including passenger conduct in terminals and aboard aircraft. In United States v. Vasquez-Algarin (2d Cir. 2016), the Second Circuit Court of Appeals upheld federal prosecution for drug possession on an intrastate flight within Puerto Rico, holding that the federal government's aviation authority encompasses all flights regardless of whether they cross state or territorial boundaries.

TSA Regulations: 49 C.F.R. Part 1540

TSA's screening regulations require passengers to submit to security screening and prohibit interference with screening personnel. Notably, the regulations do not explicitly list marijuana as a prohibited item. TSA's Prohibited Items List focuses on security threats—weapons, explosives, flammable materials—rather than controlled substances. This regulatory gap creates the current policy ambiguity. TSA screeners must report suspected federal crimes to law enforcement under general federal employee obligations, but marijuana detection is incidental to security screening rather than a primary objective.

State Laws: The Legalization Patchwork

As of May 2026, 24 states and the District of Columbia have legalized adult-use cannabis, while 38 states permit medical use. Possession limits vary dramatically: Alaska allows one ounce in public, Michigan permits 2.5 ounces, and Vermont allows two ounces. Medical programs range from low-THC CBD-only laws in states like Texas to comprehensive programs in states like Oklahoma that permit high-THC products. None of these state laws provide protection in federal jurisdiction. A medical marijuana patient with a valid state card commits a federal crime by possessing cannabis at an airport, even if they never board a flight.

State-by-State Airport Policies

Actual enforcement varies more by airport jurisdiction than by state cannabis law, creating a complex landscape where departure location matters more than destination.

California

Los Angeles International Airport, San Francisco International Airport, San Diego International Airport, and other major California airports adopted permissive policies following adult-use legalization in 2016. LAX policy states that airport police do not cite passengers for possession up to 28.5 grams (approximately one ounce) of cannabis or eight grams of concentrated cannabis. However, the policy warns that federal law applies once passengers pass through TSA screening, and destination state laws apply upon arrival. TSA at California airports refers cannabis cases to airport police, who typically allow passengers to proceed or dispose of cannabis in amnesty boxes.

Colorado

Denver International Airport pioneered the civil citation approach in 2013. Possession under one ounce results in a civil fine rather than criminal charges. The airport installed 20 amnesty boxes throughout terminals, which collected 4,100 pounds of cannabis in 2025. Colorado Springs Airport and other smaller Colorado airports follow similar policies. TSA referrals to Denver Police declined from 140 in 2019 to 29 in 2025 as screeners increasingly exercised discretion to ignore small quantities.

Washington

Seattle-Tacoma International Airport adopted a policy in 2013 making adult marijuana possession the lowest law enforcement priority. Airport police do not respond to TSA referrals for possession under 28 grams unless aggravating circumstances exist. The airport does not provide amnesty boxes, instead directing passengers to dispose of cannabis before entering security screening.

New York

Following adult-use legalization in March 2021, New York airports including John F. Kennedy International Airport, LaGuardia Airport, and Newark Liberty International Airport (operated by the Port Authority of New York and New Jersey) adopted policies allowing possession up to three ounces. Port Authority Police issue civil summonses rather than criminal charges for violations within state legal limits. However, New Jersey's separate legal framework complicates Newark enforcement—New Jersey law allows possession up to six ounces, creating a higher threshold than New York.

Illinois

Chicago O'Hare and Midway airports permit possession up to 30 grams (approximately one ounce) for Illinois residents and 15 grams for non-residents, mirroring state law. Chicago Police issue civil citations for violations. The airports do not provide amnesty boxes but prominently post warnings about federal law and destination state laws.

Nevada

Las Vegas McCarran International Airport (now Harry Reid International Airport) installed amnesty boxes in 2019 that collected 3,200 pounds in the first year. Clark County law enforcement does not cite passengers for possession within Nevada's legal limits (one ounce for adults), but TSA actively refers cases to officers who ensure disposal before passengers board flights. The policy aims to prevent tourists from attempting to transport cannabis purchased in Las Vegas to prohibition states.

Massachusetts

Boston Logan International Airport adopted a permissive policy in 2018 following adult-use legalization. Massachusetts State Police do not cite passengers for possession up to one ounce. However, Logan serves as a major international gateway, and Customs and Border Protection maintains strict enforcement for international travelers, creating confusion about which agency has jurisdiction in different terminal areas.

Texas

Dallas/Fort Worth International Airport, George Bush Intercontinental Airport in Houston, and Austin-Bergstrom International Airport maintain strict enforcement despite Texas having a limited medical program. Airport police arrest passengers for any marijuana possession, with cases referred to county prosecutors. Texas law classifies possession under two ounces as a Class B misdemeanor punishable by up to 180 days in jail and a $2,000 fine. Texas airports accounted for approximately 340 marijuana arrests in 2025, representing 18% of all U.S. airport cannabis arrests despite Texas having only 9% of U.S. air traffic.

Florida

Orlando International Airport, Miami International Airport, and Fort Lauderdale-Hollywood International Airport enforce Florida's medical-only program strictly. Possession without a valid Florida medical marijuana card results in criminal charges. Florida law classifies possession under 20 grams as a first-degree misdemeanor punishable by up to one year in jail. Florida airports arrested 156 passengers for marijuana possession in 2025.

Georgia

Hartsfield-Jackson Atlanta International Airport maintains strict enforcement despite Georgia's limited low-THC medical program. Atlanta Police arrested 89 passengers in 2025 for marijuana possession. Georgia law classifies possession under one ounce as a misdemeanor punishable by up to one year in jail and a $1,000 fine.

Market and Business Implications

TSA marijuana policy creates operational barriers that cost the cannabis industry an estimated $400-600 million annually in lost efficiency and compliance costs.

Multi-State Operator Constraints

Companies operating in multiple states cannot transport cannabis products between facilities for quality control testing, executive review, or inventory balancing. Curaleaf, which operates in 18 states, maintains separate testing laboratories in each state rather than consolidating to regional facilities, adding approximately $8 million annually in duplicated infrastructure costs according to the company's 2025 annual report. Trulieve, operating 215 dispensaries across 11 states, cannot conduct centralized product development—each state team must independently develop and test new formulations. This fragmentation prevents economies of scale that benefit other industries. A pharmaceutical company can manufacture a drug in Puerto Rico, test it in New Jersey, and distribute nationally. Cannabis companies must replicate the entire supply chain in each state, driving up costs that ultimately burden consumers.

Industry Events and Trade Shows

The Marijuana Business Conference, which drew 35,000 attendees to Las Vegas in 2025, prohibits cannabis products in the exhibition hall due to federal prohibition and venue insurance restrictions. Exhibitors display empty packaging and use hemp-derived CBD samples as proxies for THC products. This prevents meaningful product evaluation—a buyer for a Massachusetts dispensary chain cannot sample a California cultivator's flower to assess quality before negotiating a licensing deal. Industry executives routinely violate federal law by transporting small product samples in checked baggage, accepting the risk to conduct business. A 2024 survey by MJBizDaily found that 67% of cannabis executives had transported cannabis products by air at least once, with 23% doing so regularly.

Investment and Capital Flows

Institutional investors conducting due diligence on cannabis companies cannot visit multiple facilities in a single trip while transporting product samples for independent testing. Private equity firms evaluating cultivation operations must hire local consultants in each state rather than deploying a single expert team, increasing transaction costs by an estimated 15-25% according to cannabis investment bank Viridian Capital Advisors. Insurance companies exclude cannabis-related losses from commercial travel policies. A cannabis company executive whose luggage containing product samples is lost or stolen cannot file a claim, creating uninsured risk that deters sample transportation and limits quality oversight.

Medical Patient Access

Medical cannabis patients face impossible choices when traveling. A patient using cannabis oil to manage chemotherapy side effects cannot legally travel to visit family during treatment. Patients who attempt to travel with medicine risk arrest, while those who go without risk symptom exacerbation. Some patients resort to shipping cannabis via mail or private carriers, which constitutes federal drug trafficking and carries far more severe penalties than simple possession. Others attempt to source medicine at their destination, but out-of-state medical cards have limited reciprocity—only 12 states recognize out-of-state medical marijuana cards as of 2026. The Department of Veterans Affairs prohibits VA doctors from recommending medical marijuana, even in legal states, due to federal prohibition. This means veterans using cannabis for PTSD or chronic pain cannot obtain medical documentation that might provide even symbolic protection during travel.

What Experts Say

Legal scholars, law enforcement officials, and industry leaders broadly agree that federal-state policy conflict creates untenable uncertainty, though they diverge on solutions. Robert Mikos, professor at Vanderbilt Law School and author of "Marijuana Law, Policy, and Authority," has argued that TSA could exercise enforcement discretion more explicitly. According to Mikos, the agency could adopt a formal policy declining to refer passengers possessing quantities consistent with state law, similar to how prosecutors exercise discretion not to pursue certain cases. However, Mikos acknowledges that such a policy might face legal challenges from prohibition-state attorneys general who could argue TSA has a non-discretionary duty to enforce federal law. Sam Kamin, professor at University of Denver Sturm College of Law, has written extensively on marijuana federalism. Kamin has noted that the current system creates perverse incentives—passengers who successfully conceal cannabis face no consequences, while those who honestly disclose medical use to TSA screeners face law enforcement referral. According to Kamin, this rewards deception and undermines the transparency that effective security screening requires. The Law Enforcement Action Partnership, a nonprofit representing police and prosecutors who support drug policy reform, released a statement in 2024 calling TSA marijuana referrals a waste of law enforcement resources. According to Major Neill Franklin, the organization's executive director and a 34-year law enforcement veteran, airport police should focus on serious crimes rather than processing cannabis cases that prosecutors increasingly decline to pursue. Kevin Sabet, president of Smart Approaches to Marijuana and a prominent legalization opponent, has argued that permissive airport policies send dangerous messages about federal law. According to Sabet, TSA must maintain consistent enforcement to avoid normalizing drug use and creating confusion about legal boundaries. Sabet has advocated for increased penalties for air travel with marijuana to deter violations. The National Cannabis Industry Association has called for congressional action to resolve the federal-state conflict. According to NCIA's 2025 policy agenda, the organization supports the SAFE Travel Act, proposed legislation that would prohibit TSA from referring passengers to law enforcement for cannabis possession in quantities legal under state law when traveling between two states with legal programs. The bill has not advanced beyond committee hearings as of May 2026. Hilary Bricken, attorney at Harris Bricken and chair of the firm's cannabis practice, has advised clients that the safest approach remains not traveling with cannabis products. According to Bricken, even in permissive jurisdictions, passengers face unpredictable enforcement depending on which TSA screener and which law enforcement officer they encounter. Bricken has noted that a single arrest can result in job loss, professional license revocation, and immigration consequences for non-citizens, making the risk disproportionate to any convenience gained.

What's Next

Three pending developments will shape TSA marijuana policy over the next 12-24 months: DEA rescheduling, congressional legislation, and potential TSA guidance updates.

DEA Rescheduling Timeline

The Administrative Law Judge hearing on cannabis rescheduling from Schedule I to Schedule III concluded evidentiary proceedings in March 2026. The ALJ is expected to issue a recommended decision by September 2026. If the recommendation favors rescheduling, the DEA Administrator must issue a final rule, likely by early 2027. However, rescheduling to Schedule III would not legalize cannabis or directly change TSA policy—Schedule III substances like ketamine require valid prescriptions for legal possession, and recreational use would remain prohibited. The rescheduling process could indirectly affect TSA policy if it prompts the agency to issue updated guidance distinguishing medical marijuana with valid documentation from recreational possession. However, TSA has given no indication it plans such a distinction.

Congressional Legislation

The SAFE Travel Act, introduced in the House of Representatives in February 2026, would prohibit TSA from referring passengers to law enforcement for cannabis possession in amounts legal under state law when traveling between two states with legal programs. The bill has 67 co-sponsors as of May 2026 but has not received a committee vote. Even if the bill passes the House, it faces uncertain prospects in the Senate, where it would need 60 votes to overcome a filibuster. The broader Cannabis Administration and Opportunity Act, which would deschedule cannabis entirely and regulate it similarly to alcohol, remains stalled in committee. Comprehensive federal legalization would resolve TSA policy conflicts but faces significant political obstacles.

TSA Guidance Updates

TSA could issue updated guidance clarifying enforcement priorities without congressional action. Potential updates might include explicit quantity thresholds below which screeners would not refer passengers to law enforcement, or formal recognition of medical marijuana cards as mitigating factors. However, any such guidance would face scrutiny from prohibition-state officials and could prompt legal challenges. The agency's March 2026 guidance update suggests TSA prefers incremental clarifications rather than sweeping policy changes. Future updates will likely continue this pattern—clarifying ambiguities around hemp-derived products and medical exceptions while maintaining the core position that marijuana remains federally prohibited.

State-Level Developments

Additional states are likely to legalize adult-use cannabis over the next two years. Legalization ballot initiatives are planned for 2026 in Florida, North Dakota, and South Dakota. If these initiatives pass, their airports will face decisions about local enforcement policies, potentially expanding the number of permissive jurisdictions. Conversely, some prohibition states may adopt stricter airport enforcement in response to increased interstate travel with cannabis. Texas legislators introduced a bill in 2025 that would create enhanced penalties for marijuana possession at airports, though the bill did not advance.

Litigation Possibilities

No major litigation currently challenges TSA marijuana policy, but several potential legal theories could emerge. Medical marijuana patients could argue that TSA referrals violate the Americans with Disabilities Act by discriminating against individuals using medicine for qualifying conditions. However, courts have consistently held that the ADA does not protect illegal drug use, and marijuana remains illegal under federal law. Civil rights organizations could challenge disparate enforcement through Equal Protection claims, arguing that Black travelers face discriminatory referral rates. Such litigation would require extensive statistical evidence and would likely focus on local law enforcement practices rather than TSA policy itself.

Further Reading

• TSA Official Marijuana Policy Statement: https://www.tsa.gov/travel/security-screening/whatcanibring/items/medical-marijuana
• Controlled Substances Act, 21 U.S.C. § 812: https://www.govinfo.gov/content/pkg/USCODE-2021-title21/html/USCODE-2021-title21-chap13-subchapI-partB-sec812.htm
• Agriculture Improvement Act of 2018 (Farm Bill): https://www.congress.gov/bill/115th-congress/house-bill/2
• DEA Notice of Proposed Rulemaking on Cannabis Rescheduling (May 2024): https://www.federalregister.gov/documents/2024/05/21/2024-10524/schedules-of-controlled-substances-rescheduling-of-marijuana
• Denver International Airport Cannabis Policy: https://www.flydenver.com/security/prohibited
• Los Angeles International Airport Cannabis Policy: https://www.flylax.com/travelsafely
• NORML Guide to Flying with Cannabis: https://norml.org/laws/traveling-with-cannabis/
• U.S. Travel Association Policy Statement on Cannabis (2024): https://www.ustravel.org/research/cannabis-travel-policy
• ACLU Report on Racial Disparities in Airport Cannabis Enforcement (2025): https://www.aclu.org/reports/airport-cannabis-enforcement
• National Cannabis Industry Association SAFE Travel Act Summary: https://thecannabisindustry.org/safe-travel-act/

Update — May 24, 2026: TSA Clarifies Medical Marijuana Documentation Requirements

The Transportation Security Administration updated its guidance on medical marijuana documentation at checkpoint screening in May 2026, according to revised language posted to the agency's "What Can I Bring?" web tool. The update specifies that passengers traveling with FDA-approved cannabinoid medications—Epidiolex, Marinol, Syndros, or Cesamet—must carry prescription labels matching government-issued identification. TSA officers will verify the prescription holder's name against boarding documents before allowing the medication through security.

The clarification does not alter the agency's core enforcement posture: TSA screening is designed to detect security threats, not illegal drugs, and officers refer suspected violations of federal or state law to local law enforcement. The updated guidance emphasizes that state-issued medical marijuana cards do not satisfy federal documentation standards because cannabis remains a Schedule I controlled substance under the Controlled Substances Act. Passengers carrying non-FDA-approved cannabis products—flower, edibles, vapes, or concentrates—face potential referral regardless of state medical authorization.

Airport police responses vary by jurisdiction. Denver International Airport and Seattle-Tacoma International Airport maintain policies allowing possession of quantities permitted under state law, while airports in states without legal cannabis programs routinely confiscate products and issue citations. The Federal Aviation Administration separately prohibits all cannabis aboard aircraft under 49 CFR § 175.10(a)(4), creating liability for passengers even when TSA does not intervene.

The documentation requirement matters most for pediatric epilepsy patients traveling with Epidiolex, the only FDA-approved cannabis-derived medication widely prescribed in the United States. Families must now ensure prescription bottles display current information and match the child's legal name on travel documents. Industry observers noted the update reduces ambiguity for the estimated 25,000 Epidiolex patients who fly annually but does not resolve the legal risk for the majority of medical marijuana cardholders using non-approved products.

TSA emphasized the update reflects existing federal law rather than new policy, but the explicit documentation language provides clearer grounds for checkpoint officers to distinguish lawful pharmaceutical cannabis from prohibited marijuana. Passengers should verify state and local laws at both departure and arrival airports before attempting to travel with any cannabis product.