The TSA’s primary mission is focused on security and detecting threats like explosives or weapons, rather than searching for illegal drugs. However, if a TSA officer discovers a substance that appears to be marijuana or a controlled substance during the screening process—such as a Delta 8 vape cartridge—they are legally required to refer the matter to local law enforcement. While Delta 8 is federally legal under the 2018 Farm Bill (provided it contains less than 0.3% Delta 9 THC), TSA officers are not chemists and cannot verify the legality of your specific cartridge on the spot. In 2026, many local jurisdictions still have varying laws regarding hemp-derived cannabinoids, and the final decision on whether you can proceed rests with the local police officer who responds to the TSA's call. To avoid delays or potential legal issues, it is generally advised not to travel with these items. If you must, ensure it is in your carry-on (as lithium batteries are banned from checked bags) and be prepared for a long conversation with security that could result in you missing your flight.