Short answer
No. Federal law bans cannabis on flights that cross state lines. Marijuana sits in Schedule I of the Controlled Substances Act, 21 U.S.C. § 812. Air travel runs under federal jurisdiction. A state medical card and a state adult-use law do not change the federal rule.
what happens if you cross state lines with weed
TSA screens passengers as a federal agency. TSA states that its officers do not search for marijuana or other drugs and that screening targets threats to aviation. If an officer finds cannabis during a bag check, TSA refers the matter to local law enforcement. The local police then decide based on state law at that airport.
What federal law says
- 21 U.S.C. § 844 covers simple possession of a Schedule I drug. A first offense carries up to 1 year in prison and a $1,000 minimum fine.
- 21 U.S.C. § 841 covers possession with intent to distribute. That charge applies to moving cannabis from one state to another.
- 21 U.S.C. § 841(b)(1)(B): 100 kg of marijuana or 100 plants triggers a 5-year mandatory minimum.
- 21 U.S.C. § 841(b)(1)(A): 1,000 kg or 1,000 plants triggers a 10-year mandatory minimum.
Amounts below those thresholds still carry felony exposure. Sentencing turns on quantity, prior record, and the federal district.
Who handles the case
Airports sit on state land. Security and airspace run under federal rules. Two systems can act on the same incident.
cannabis interstate transport penalties
- TSA finds the item and calls airport police or the county sheriff.
- Local police apply state law. In a legal state, a small personal amount may lead to no charge. Policy varies by airport and by officer.
- Federal agents, including DEA and CBP, can take the case. CBP handles international arrivals and border crossings.
If a flight diverts to a state where cannabis is illegal, possession in that state is a state crime.
State lines and state laws
As of 2025, 24 states and the District of Columbia allow adult use. Most states allow medical use with a card. No state law authorizes transport into another state. Colorado, California, Oregon, and Washington all bar taking cannabis out of state.
A state medical card has no force outside the issuing state. Federal law recognizes no state card.
Carry-on and checked bags
Checked bags go through the same screening as carry-on bags. TSA uses X-ray imaging and explosive trace detection. Some airports use dogs trained on cannabis, though many airport canine units target explosives and other threats.
Carry-on and checked bags carry the same federal exposure. A quantity above a personal-use amount raises the risk of a distribution charge.
CBD and hemp
Hemp with 0.3 percent THC or less is legal under federal law, per the 2018 Farm Bill at 7 U.S.C. § 1639o. State rules differ. Some states ban hemp products that contain any THC. TSA can still pull an item and call law enforcement if a test shows THC above the federal limit.
If you are stopped at an airport
- You can decline consent to a bag search. Officers may proceed with a warrant or under a recognized exception.
- You can ask if you are free to leave. If not, you are detained.
- You can ask for a lawyer and stay silent. Statements can be used in a state or federal case.
- A state charge and a federal charge can both follow from one incident.
Open points
Enforcement varies by airport, state, and federal district. There is no public count of TSA cannabis referrals by airport. Department of Justice guidance on state-legal cannabis has changed across administrations. Check current federal rules and the laws of both the departure state and the arrival state before you travel.