As marijuana becomes legal in more states, The Washington Post wanted to address a question many travelers have: Can you bring weed through airport security? You’re flying from a state where marijuana is legal to a state where marijuana is legal. You think that means you’re in the clear, but you’d be wrong. No matter your departure and arrival destinations, it’s still illegal to fly with marijuana. They enforce federal laws, and “at the federal level it remains criminal to possess any amount of cannabis even for medical purposes,” says Brett Schuman, co-chair of the Cannabis practice. However, that doesn’t mean you’re going to federal prison if TSA finds weed in your bag. "This is not written down anywhere, but individual TSA officers could exercise discretion to not report you at all,” Schuman says.