What Are Vape Detectors [& How to Avoid Triggering Them] Do Vapes Set Off Smoke Alarms? Find Out Here! Vapoholic Found out what an airplane smoke detector sounds like : r unitedairlines 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. Can Vaping Devices Set Off Smoke Alarms? I just learned from this video that vaping in the plane's lavatory will NOT set off the smoke alarm. : r aviation