For many Americans, legal cannabis is part of their wellness or relaxation routine—but what happens when it’s time to fly? Traveling with cannabis in the U.S. remains a complicated issue, largely because federal and state laws don’t align. While more than half of U.S. states have legalized cannabis for medical or recreational use, it’s still illegal under federal law. That means air travel, which falls under federal jurisdiction, can present risks even for legal users.
Federal Law vs. State Law
The Transportation Security Administration (TSA) operates under federal authority, and federal law still classifies cannabis—including THC products—as a Schedule I controlled substance. This means it’s technically illegal to bring marijuana through airport security, even if you’re flying between two states where it’s legal.
However, TSA officers are not law enforcement. Their focus is on security threats, not searching for drugs. If they discover cannabis during screening, they’re instructed to contact local law enforcement. Depending on the airport’s location and state law, this could result in anything from confiscation to a citation—or, in rare cases, arrest.
TSA’s Stance on Cannabis
According to TSA’s official guidance, cannabis products containing less than 0.3% THC (the federal limit for hemp) are permitted in both carry-on and checked bags. This includes many CBD oils, lotions, and edibles made from hemp. But if a product contains more THC than allowed, it could trigger legal complications.
TSA’s website clarifies, “TSA security officers do not search for marijuana or other illegal drugs, but if discovered during security screening, TSA will refer the matter to a law enforcement officer.” Essentially, enforcement depends on where you are and how local authorities handle such cases.
Airport Cannabis Rules Differ by Location
Several airports in states with legal cannabis have their own policies. For example, Los Angeles International Airport (LAX) allows passengers over 21 to possess cannabis within state legal limits while on airport property. However, once you pass through security or board a plane, federal law takes precedence.
Denver International Airport (DIA), on the other hand, prohibits all cannabis possession on airport property, regardless of state law. Chicago O’Hare and Midway airports take a middle ground: cannabis amnesty boxes are provided for travelers who need to dispose of marijuana before security.
Travelers should always check the airport’s official policy before flying. Policies can differ not only from state to state but also from airport to airport.
Flying with Medical Cannabis
Medical cannabis patients face additional complexities. Even with a valid medical marijuana card, carrying cannabis through airport security or across state lines remains illegal under federal law. The only exception applies to FDA-approved medications like Epidiolex, a CBD-based prescription drug.
If traveling for medical reasons, it’s safest to carry proper documentation and plan ahead. Some patients choose to ship cannabis products to their destination through legal channels or purchase them upon arrival if state laws allow.
Cannabis in Checked Luggage
Placing cannabis in checked luggage does not make it legal. Checked bags are still subject to TSA inspection and federal regulation. If discovered, the same reporting rules apply—TSA will notify local law enforcement.
The Best Approach for Air Travelers
The safest rule of thumb: leave cannabis at home when flying. Purchase or use it legally once you’ve reached your destination. If you rely on CBD, ensure products are hemp-derived and clearly labeled with less than 0.3% THC.
As legalization expands, air travel regulations may evolve—but for now, federal law rules the skies. Staying informed and cautious helps ensure a smooth trip without turbulence from unexpected legal trouble.