Ever noticed the ashtray in airplane bathrooms and wondered why it's there when smoking on planes is banned? I wonder the same and please tell me in comment section if you know Can You Fly with a Vaporizer? HEMPER Vaping is not allowed on airplanes. We keep seeing it, so we'll keep repeating it: In the United States, the Federal Aviation Administration (FAA) prohibits the use of electronic cigarettes or Don't Vape on an Airliner! FAA Regulations