Vaping and Smoke Alarms: What Actually Triggers the Sensors Vapesdirect Brilliant: Passenger Smokes In Lavatory On My United Flight And Sets Off Alarm Live and Let's Fly Can You Take E cigs On Aeroplanes Vapes on Planes 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 You Take Vape Juice On A Plane What You Should Know? vaping on the flight : r unitedairlines