Aircraft Lavatory Smoke Detector Facts 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. So, This Is What Actually Happens If You Smoke Or Vape On A Plane HuffPost UK Life Will a Disposable Vape Go Off in a Metal Detector? Do Vapes Set Off Smoke Alarms? Royal Flush Vape UK