The TSA is clear that electronic smoking devices are not allowed in checked luggage at all. If you plan to bring it along, it'll need to be in your carry-on.
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E cigarettes and vape devices are allowed “in carry-on baggage or on your person“, however they may not be used OR charged while in the plane.
You already know the most important TSA vape rules: liquids in carry-on bags all go into a single 1-quart bag, and all electronic devices and lithium batteries must be carried onto the plane, and must go (along with the traveler) through security screening.
Vaping devices like vape mods and vape pens can travel with you on airplanes. They can go in carry-on luggage or in your pockets. But never in checked luggage. That's for any kind of vapes that have lithium batteries.
If your airline allows disposable vapes onboard, make sure that they are properly secured away. Disposable vapes should be placed in your hand luggage and kept close to you at all times during the flight. Remember to never place disposable vapes in your checked luggage.
You can take electronic cigarettes in your carry-on luggage but are advised to seal e-liquids in a clear bag with a limit of 100ml per bottle. You can take a maximum of 15 batteries (including other devices), packed either in hand or checked luggage provided they are installed within a device.
The fine for smoking or vaping on a flight can range from $2 to $4,000, and by itself is not a jailable offense. However, it can quickly escalate if a person is found to have tampered with a smoke detector, or failed to comply with a crew member's instruction, such as to stop smoking.
Just leave it in your purse. You don't have to take it out. You can carry it on no problem, just whatever you do don't put it in your checked luggage. I travel about 3 times a week and just keep it in my purse, not once has security pulled it out and asked what it was.