01The rules in detail
Self-defense sprays are prohibited in the cabin everywhere. TSA allows one 4 oz (118 ml) container with a safety cap in checked baggage; many airlines and all international routes prohibit it. Stun guns and tasers can be checked in the US if the battery is protected, but are illegal in the UK, most of the EU, Australia and much of Asia — arriving with one is a criminal offence. Kubotans, tactical pens and knuckle dusters are often treated as weapons abroad even if they pass a US checkpoint.
02Tips
- Leave all self-defense items at home for international travel.
- A personal alarm is legal everywhere and effective.
03Frequently asked
Can I bring pepper spray or a taser in my carry-on?
No. Pepper spray and mace: never in carry-on; one small can (under 118 ml with a safety mechanism) in checked bags on US domestic flights only. Tasers, stun guns, brass knuckles and batons: checked only in the US, and illegal to possess in many countries.
Can I pack pepper spray or a taser in checked luggage?
Yes, with limits. Pepper spray and mace: never in carry-on; one small can (under 118 ml with a safety mechanism) in checked bags on US domestic flights only. Tasers, stun guns, brass knuckles and batons: checked only in the US, and illegal to possess in many countries.
Are the rules the same outside the US?
Mostly similar for liquids and batteries, which follow international standards, but sharp objects, tools, lighters and self-defense items vary widely by country. Check the departure airport's rules and the destination's laws.
TSA and other agencies allow officers to refuse any item they judge unsafe, and rules change. This page summarises published guidance as of the verified date; confirm on tsa.gov or your airport's site before packing anything unusual.