Can a Vape Set Off a Fire Alarm? What You Should Know Smoking or vaping is not allowed on any flight to or from the United States. You can carry an e cig in your hand luggage, but you cannot use it in the cabin. Will Vaping Set Off Hotel Smoke Alarms? So, This Is What Actually Happens If You Smoke Or Vape On A Plane HuffPost UK Life Vaping and Smoke Alarms: What Actually Triggers the Sensors Vapesdirect Best Vape Detector (updated for 2026)