Do Disposable Vapes Set Off Metal Detectors? What You Need to Know What Really Happens If Someone Were To Vape On A Plane On March 26, Alaska Airlines Flight 1463 was cruising from Seattle to Sacramento on a Boeing 737 MAX 9 when the lavatory smoke alarm went off at 35,000 feet. A passenger had vaping on the flight : r unitedairlines Passenger Vapes On Plane Smoke Alarm Goes Off At 35,000 Feet, Police Requested