Airport and airline rules, checked for you
The things that cause problems at security and the gate. Every rule links to the government or airline page it comes from, checked 22 October 2026.
Power banks
Convert mAh to Wh and check the limits of 38 airlines.
Liquids at security
The 100 ml rule in the UK, EU and US, the 2-litre scanner lanes, and exemptions.
Cabin bag sizes
Check if your bag fits 36 airlines’ cabin allowances.
Vapes and e-cigarettes
Hand luggage only, never in the hold. UK, US and arrival limits.
Medicines and medical equipment
Liquid medicines over 100 ml, proof you need, and controlled drugs.
Lithium batteries
Spare batteries: 100 Wh, 160 Wh with approval, and how to pack them.
Duty-free allowances
Alcohol, tobacco and goods limits arriving in Great Britain, the EU and the US.
Before you fly
- Check your departure airport’s own page for liquids: GOV.UK says the rules “depend on the airport”.
- Check the airline that operates your flight. Codeshare partners can have different bag and battery rules.
- For entry rules and safety advice for your destination, see travel advice by country.