(REAL TEST) Can Smoke Detectors Detect Vape? (compared with a Vape Detector) 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. I just learned from this video that vaping in the plane's lavatory will NOT set off the smoke alarm. : r aviation March 26th, 2026: A passenger on Alaska Airlines flight ASA1436 from Seattle to Sacramento set off a smoke alarm at 35,000 feet after using a vape inside the lavatory, prompting the pilots