Can you take vapes in hand luggage?

Why vapes must go in hand luggage

The rule is set by the Civil Aviation Authority (CAA) and the International Air Transport Association (IATA), and every UK airline enforces it. Vapes contain lithium-ion batteries, and lithium-ion batteries can overheat or catch fire.

If a battery has a thermal event in the cabin, the flight crew can see it, isolate it, and put it out within seconds. If it happens in the cargo hold, nobody is down there to deal with it. By the time a fire is detected from the cockpit, it could already be serious. That is why every lithium-ion powered device, including vapes, power banks, laptops and cameras with removable batteries, must travel in the cabin where it can be supervised.

This is not a guideline or a recommendation. It is mandatory under aviation safety regulations. You can be denied boarding if vapes are found in your hold luggage, and items will typically be confiscated and disposed of.

The five core rules for flying with vapes

How much e-liquid you can bring

E-liquid in hand luggage follows the same 100ml-per-bottle rule as any other liquid. Total liquid allowance is a 1 litre clear resealable bag, so theoretically you could fit around 10 x 10ml bottles of e-liquid plus your toiletries, but in practice toiletries usually take most of the bag.

• 10ml bottles: Each well under the 100ml limit. You can pack as many as fit in your liquids bag.
• 50ml shortfills: Each is under the limit, but they take up a lot of bag space. You will probably only fit 2 or 3.
• 100ml shortfills: At the upper limit. Customer beware: some security staff are stricter about full-limit bottles, so allow extra time at security.
• Larger than 100ml: Not allowed in hand luggage. Can go in hold luggage (the e-liquid only, not the device), but pressure changes often cause leaks. Pack inside a sealed plastic bag or two.
• Prefilled pod kits: Count as liquid. The whole device with prefilled pod typically goes in your liquids bag as a single unit. Some security staff are happy with the device out of the bag.

The new vape duty has the same rules for travel. You can still buy e-liquid duty-free at the airport (subject to destination customs allowances), although duty-free pricing from October 2026 onwards may be less of a saving than it once was.

UK airline policies compared

All UK airlines follow the same core CAA rules, but they vary on small details like how many spare batteries you can bring and how strictly they enforce activation locks.

Always check your specific airline's vape policy before flying. The rules can change, and enforcement varies between airports and even between individual security officers.

What about the e-cigarette battery watt-hour limit?

Aviation regulations cap the watt-hour (Wh) rating of lithium batteries that can be carried in the cabin. Most vape batteries are well under the limit, but worth understanding the threshold.

• Up to 100Wh: No special permission needed. Pretty much every consumer vape battery falls into this category.
• 100Wh to 160Wh: Allowed with airline approval. You need to contact the airline before travel and they may limit you to 2 spare batteries.
• Above 160Wh: Not allowed on commercial passenger flights at all. Some specialist drone batteries fall into this range.

For reference, a standard 18650 vape battery is around 12Wh, and even a high-capacity 21700 cell is around 18Wh. You are unlikely to ever hit the 100Wh limit unless you are carrying a serious power bank or a drone battery.

The packing checklist

1. Empty or top up your tank

   Cabin pressure drops during flight and partial-fill tanks leak. Either empty completely or fill to the brim.

2. Switch the device off and lock it

   5-click lock on most pod kits. Fire button lock on most mods. Bag-pressure activation is the main risk you are preventing.

3. Put e-liquid in your clear liquids bag

   All bottles in the same 20cm x 20cm transparent resealable bag. Pull it out separately at security.

4. Protect spare batteries

   Plastic case, silicone sleeve or even taped terminals. The goal is no metal-to-metal contact in your bag.

5. Pack vape near the top of your hand luggage

   Security may ask to inspect it separately. Easy access avoids holding up the queue.

6. Bring a small pouch or zip-bag for leaks

   Despite all precautions, leaks happen. A small ziplock bag around the device limits the damage if pressure does its worst.

7. Have spare pods or coils with you

   Hardware can stop working at altitude or after the cabin pressure equalises. Spare pods or coils mean you are not stuck without your vape during a layover.

The bottom line