Unfortunately, the dream of wielding a real lightsaber is still far from becoming a reality. But fear not, as you can still bring along a toy lightsaber on your travels. Whether you choose to keep it in your carry-on or checked bag, you can channel your inner Jedi and let the force be with you. It’s worth noting that the ultimate authority on whether you can bring your lightsaber through airport security lies in the hands of the TSA officer. So remember to be prepared for that moment of decision and may the force guide you on your travels.
https://www.tsa.gov/travel/security-screening/whatcanibring/items/light-saber