In 2026, TSA and international aviation guidelines (like EASA) require all vaping devices and electronic cigarettes to be carried in your carry-on luggage or on your person—never in checked baggage due to the fire risk from lithium-ion batteries. Whether you need to "take it out" of your bag depends on the security technology at the airport. At airports using older X-ray scanners, you are generally required to remove larger electronic devices (bigger than a cell phone) from your bag; since many modern vapes are small, they often stay inside. However, at many high-tech 2026 checkpoints using CT scanners, you can leave all electronics inside your bag. Vape liquids are still subject to the "3-1-1" rule: they must be in containers of 3.4 oz (100ml) or less and placed in a clear, quart-sized plastic bag, which must be removed and placed in a bin for screening. To avoid delays, always declare your device if asked and ensure it is switched off to prevent accidental activation during the screening process.