Yes, vapes and e-cigarettes are allowed through airport security, but they are subject to strict packing and usage rules. According to TSA and international aviation standards, vapes, e-cigarettes, and spare lithium batteries must be kept in your carry-on luggage or on your person. They are strictly prohibited in checked baggage because lithium batteries pose a fire risk in the cargo hold. When passing through security, you may be asked to remove the device for separate screening. Any e-liquids or pods must follow the "3-1-1" liquid rule: they must be in containers of 100ml (3.4 oz) or less and fit within a single, quart-sized clear plastic bag. It is also important to remember that while you can carry them, vaping is strictly banned inside almost all airport terminals and on board the aircraft. Violating these rules can lead to heavy fines, and some countries (like Thailand or India) have total bans on the possession of vapes, which can lead to confiscation upon arrival.