Can you take a knife on a plane UK?

Current UK law states: “carrying knives or any weapons in public without a 'good reason' is illegal”. So it's understandable that airlines enforce strict rules on bringing such items on flights. Sharp or pointed blades over 6 cm are not allowed in hand luggage in the UK.



Under UK aviation security rules in 2026, you are strictly prohibited from carrying most knives in your hand luggage. Any knife with a blade over 6cm (approx. 2.4 inches) is banned from the cabin and must be packed in your checked (hold) luggage. Even for knives with blades under 6cm—such as small Swiss Army knives—security officers at UK airports have the final discretion to confiscate them if they believe the item could be used as a weapon or poses a safety risk. "Locking" knives (where the blade stays open) and "flick knives" are generally prohibited regardless of length. To avoid the hassle of a manual bag search or losing a prized possession, it is almost always better to pack any sharp objects in your checked luggage. If you are traveling "hand-luggage only," it is safest to assume that no knife, regardless of size, will be permitted through the security checkpoint.

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In general, you are prohibited from traveling with sharp objects in your carry-on bags. Multi-tools (multipurpose tools) with knives of any length are prohibited. Please pack these items in your checked bags. Multi-tools (multipurpose tools) with scissors less than 4 inches may be placed in carry-on bags.

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In the United States and European nations, TSA prohibits knives in carry-on luggage, except for plastic or round-bladed butter knives. However, blades can be packed in checked baggage if they are sheathed or securely wrapped to deter injury during air travel.

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Firearms and ammunition, as well as any replicas or imitations. Explosives and flammable items, such as fireworks, gas, and aerosols. Poisonous and toxic substances, including pesticides and certain chemicals. Lithium batteries and other hazardous materials, as these can pose a safety risk if not handled properly.

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Knives and the law in the UK It's illegal to carry a knife in public, even if you're not behaving in a threatening manner and don't plan to use it. Carrying a knife in the UK could see you facing a penalty of four years' imprisonment and a £5,000 fine for doing so.

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If you accidentally go through security with your pocket knife, you'll likely be given four options: Take the item back and check it in your luggage. Give the item to someone who is seeing you off, if they are still at the airport. Take the item to your car.

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Re: Trip to Italy and Knife laws in Italy Carry is very restricted. You Can carry multitool. But: no One has the right to search you,unless you are suspected to having committed a fellony. Do not use It in public,people might call the police.

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The bottom line: To play it safe, always fly with your Leatherman in checked baggage. Your Leatherman multi-tool has been by your side through lots of adventures and has helped you save the day. But for your upcoming plane trip, the best thing to do is to plan on putting it inside your checked baggage.

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