Do Vapes Set Off Fire Alarms in Homes Hotels and Planes How Do Vape Detectors Work? [Answered 2026] 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. Those smoke detectors do work.' A Flight Attendant Talked About What Happens If Someone Vapes Or Smokes On A Plane TwistedSifter