How vapes work at UK airport security

UK airport security uses two main rules for vapes: lithium battery rules (which ban vapes from checked luggage) and standard liquid rules (which apply to e-liquid bottles, pods and tanks). Both come from the Civil Aviation Authority. They apply to every UK airport from Heathrow and Gatwick down to small regionals.

The X-ray tray

Take your vape out of your bag before reaching the conveyor belt. Place it in the tray with your phone, tablet, laptop and any other electronics. There is no need to hide the device. Security staff at major UK airports see hundreds of vapes every day. Pod kits, mods, disposables and prefilled-pod devices are all routine items. They show up clearly on X-ray and operators recognise them at a glance. Hiding a vape inside a bag almost always triggers a manual search which slows things down for you and everyone behind you.

Your liquids bag

E-liquid is treated like any other liquid. Each bottle must be 100 ml or less. All bottles must fit inside a single transparent resealable plastic bag (max 1 litre capacity, roughly 20cm by 20cm). The bag comes out of your hand luggage and goes in the tray separately. In practice you can usually fit five to ten 10 ml nic salt bottles and one or two 50 ml shortfills. If you need more for a longer trip pack the extra bottles in your hold luggage where there is no volume restriction. Disposable vapes contain liquid so some UK airports ask you to put them in the liquids bag. Other airports do not. Ask at the tray if unsure.

Spare batteries

If you carry external 18650 or 21700 batteries for a mod they MUST travel in hand luggage only. Each battery should be in a protective plastic case to stop the terminals shorting against keys, coins or other batteries. The CAA limit is 20 spare batteries per person under 100Wh capacity which covers all standard vape cells. Loose batteries cause most airline lithium incidents. The fix is a £2 plastic battery case from any vape shop.

Why checked luggage is banned

Lithium-ion battery fires in cargo holds are extremely difficult to deal with. There is no crew down there. The hold has limited fire suppression. Cabin fires by contrast can be addressed within seconds by trained crew. That is why every airline worldwide bans lithium devices from checked baggage. If you accidentally pack your vape in your hold luggage there is a good chance the bag will be opened by ground staff and the vape removed and disposed of safely. You almost never get the device back. The rule applies to all vapes including disposables, pod kits, prefilled-pod devices and mods.

Vaping in the airport itself

Vaping inside UK terminal buildings is banned. Most airports have outdoor designated smoking and vaping areas before security. Of 23 UK airports only 11 have an airside (post-security) vape area. Aberdeen has one near Gate 5 with a small fee. Bristol, Cardiff, Doncaster, East Midlands and Liverpool also have airside areas. Belfast City, by contrast, has no airside vaping at all. Plan for nicotine pouches, gum or a patch as backup if your airport does not have an airside area.

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For more on UK travel rules covering planes, suitcases and disposables specifically head over to our full vaping guides hub where every travel and customs question is covered in plain English.