Items the TSA Prohibits in Carry-On Luggage

The Transportation Security Administration (TSA) bans certain items from carry-on bags because they pose a safety risk to the aircraft and passengers. These restrictions explore at every U.S. airport, though some items may be allowed in checked luggage instead. The rules are the same whether you fly domestic or international, though international flights sometimes have stricter limits.

The most common prohibited items fall into three categories: weapons and sharp objects, flammable materials, and tools that could be used as weapons. A single item can fall into multiple categories—a box cutter, for example, is both sharp and a tool. If you are unsure whether something is allowed, the TSA website has a searchable database, or you can text a photo to the TSA's Ask TSA service before you pack.

Key Takeaways

  • Knives, box cutters, razors, and most tools longer than 7 inches are banned from carry-on bags, though some may be checked.
  • Lighters, lighter fluid, and most aerosol sprays cannot go in carry-on or checked luggage, with narrow exceptions for one lighter in checked bags on some airlines.
  • Liquids, gels, and creams are limited to 3.4 ounces per container in carry-on bags; larger amounts must be checked.
  • Firearms, ammunition, and realistic-looking replica guns are prohibited in carry-on bags and require special handling in checked luggage.
  • Sports equipment like baseball bats, ski poles, and golf clubs are not allowed in carry-on but may be checked.

Weapons and Sharp Objects You Cannot Bring

Any knife is prohibited in carry-on luggage, including pocket knives, butter knives, and kitchen knives. Box cutters, utility knives, and razors are also banned. Scissors are allowed only if the blades are shorter than 4 inches and the handles are rounded. If you need a knife for your trip, pack it in your checked bag instead—checked luggage has different rules and allows most knives as long as they are sheathed or wrapped.

Tools longer than 7 inches cannot go in carry-on bags. This includes hammers, wrenches, screwdrivers, pliers, and crowbars. Smaller tools like a 6-inch adjustable wrench or a multi-tool with a blade shorter than 2.36 inches may be allowed, but the TSA officer at security has final say. When in doubt, check the item or leave it at home.

Sporting equipment with sharp or pointed ends is restricted. Ice axes, ski poles, and spear guns are banned from carry-on. Baseball bats, cricket bats, and golf clubs are also prohibited in carry-on bags but can be checked. Martial arts equipment like nunchucks and throwing stars cannot travel in carry-on or checked luggage at all.

Flammable Materials and Lighters

Lighters are completely banned from carry-on bags. This includes standard butane lighters, torch lighters, and electronic lighters. Lighter fluid, butane, and propane are also prohibited in both carry-on and checked luggage. The only exception is that some airlines allow a single lighter in a protective case in checked luggage, but you must check your airline's policy before packing—not all carriers permit this.

Aerosol sprays are heavily restricted. Deodorant, hairspray, and spray sunscreen are allowed in carry-on bags only if they are in containers of 3.4 ounces or smaller and placed in your quart-sized liquids bag. Larger aerosol cans must be checked. Some aerosols—like insecticide, paint thinner, and self-defense sprays—cannot travel in carry-on or checked luggage at all.

Matches are prohibited in carry-on bags. Book matches and safety matches cannot go in carry-on, though some airlines allow a single box of safety matches in checked luggage. Electronic lighters and lighter replacements are also banned from carry-on.

Liquids, Gels, and Creams in Carry-On Bags

The 3-1-1 rule limits what liquids you can bring through security: 3.4 ounces per container, 1 quart-sized clear plastic bag, and 1 bag per passenger. This rule applies to anything that flows, spreads, or sprays—including toothpaste, shampoo, conditioner, lotion, sunscreen, peanut butter, yogurt, and jam. Each container must be 3.4 ounces or smaller, even if you do not fill it completely.

Larger quantities of these items must go in checked luggage. A full-size bottle of shampoo, a jar of face cream, or a tube of sunscreen larger than 3.4 ounces cannot pass through security in your carry-on. You can pack as much as you want in checked bags, as long as the containers are not leaking and are packed so they will not damage other items.

Some items that look like liquids are actually allowed in larger amounts. Solid deodorant, solid lip balm, and solid food items do not count toward the liquid limit. A stick of deodorant or a granola bar can be any size in carry-on. If you are unsure whether something counts as a liquid, the TSA's general rule is: if it would spill or spread if the container tipped over, it is a liquid.

Firearms, Ammunition, and Realistic Replicas

No firearms of any kind are allowed in carry-on bags. This includes handguns, rifles, shotguns, and air guns. Firearms must be unloaded, declared to the airline at check-in, and packed in a locked hard-sided container in your checked luggage. You also need to follow your airline's specific procedures—some require you to fill out a form, and some charge a fee.

Ammunition cannot go in carry-on bags. Ammunition is allowed in checked luggage only if it is in a manufacturer's container or a find container designed for ammunition, and it must be declared to the airline. Realistic-looking replica guns, toy guns, and airsoft guns are banned from carry-on bags and may be prohibited in checked luggage depending on how realistic they appear.

Flare guns, signal flares, and other signaling devices are prohibited in both carry-on and checked luggage. If you are traveling with a firearm, contact your airline at least 24 hours before your flight to confirm their procedures and any fees.

Sports and Recreation Equipment Rules

Most sports equipment cannot go in carry-on bags because of size and safety concerns. Baseball bats, cricket bats, golf clubs, and hockey sticks are prohibited in carry-on but allowed in checked luggage. Ski poles, ski boots, and skis can be checked. Surfboards, bodyboards, and windsurfing boards are also checked items only.

Some smaller sports items are allowed in carry-on if they fit in the overhead bin or under the seat. A tennis racket, badminton racket, or squash racket can usually go in carry-on as long as it meets the airline's size limits. A bowling ball can be carried on if it fits in the overhead bin, though most do not. Always check your specific airline's carry-on size limits before packing.

Fishing rods and fishing tackle are allowed in carry-on bags if they fit the airline's dimensions. However, hooks and sharp fishing lures should be sheathed or wrapped to prevent injury to baggage handlers and other passengers. If your fishing equipment is large or awkward, checking it is usually easier.

Other Common Items You Cannot Bring

Self-defense sprays like pepper spray and mace are prohibited in carry-on bags. One 2% by mass tear gas self-defense spray is allowed in checked luggage only if it is equipped with a safety mechanism to prevent accidental discharge, and you must declare it to the airline. Stun guns, cattle prods, and similar devices are banned from both carry-on and checked luggage.

Certain tools and equipment are restricted even though they seem harmless. Drill bits, saw blades, and circular saws cannot go in carry-on. Crowbars, ice picks, and awls are also prohibited. Torches and blowtorches are banned from both carry-on and checked luggage.

Realistic-looking weapons are treated as actual weapons by the TSA. A toy gun that looks real, a replica sword, or a costume weapon that resembles an actual firearm will be confiscated. If you are traveling for a costume event or cosplay, pack your props in checked luggage and make sure they are clearly marked as costume pieces.

What Happens If You Try to Bring a Prohibited Item

If you arrive at security with a prohibited item, the TSA officer will confiscate it. You will not get it back. Some items are straightforward thrown away; others may be held for a period of time in case you want to retrieve them, but policies vary by airport. The best approach is to check what you are packing before you leave home.

In rare cases, attempting to bring a prohibited item through security can result in a fine or legal action, particularly if the item is a weapon or if you did not declare it. Most travelers who accidentally pack a prohibited item are straightforward told to throw it away or leave it with a friend, but do not count on this outcome.

If you realize you have a prohibited item after you have packed, you have a few options: throw it away, mail it to your destination, leave it with someone at home, or check it if the airline allows it. Some items like knives can be checked; others like lighters cannot travel at all. Checking your packing list against the TSA's rules takes five minutes and saves the frustration of reaching security and having to abandon something you wanted to bring.

Frequently Asked Questions

Can I pack a knife in my checked bag?

Yes, most knives are allowed in checked luggage as long as they are sheathed or wrapped securely so the blade cannot cut through the bag or injure baggage handlers. Kitchen knives, pocket knives, and hunting knives can all be checked. Knives are never allowed in carry-on bags.

Are nail clippers and tweezers allowed in carry-on?

Yes, nail clippers and tweezers are allowed in carry-on bags. Nail files are also permitted. The TSA allows these items because they are not considered weapons, even though they have sharp edges.

Can I bring a lighter in my checked bag?

Some airlines allow a single lighter in a protective case in checked luggage, but not all do. You must contact your airline before packing to confirm their policy. Lighter fluid and butane cannot travel in checked luggage under any circumstances.

What if my medication is a gel or liquid larger than 3.4 ounces?

Medications in liquid or gel form that exceed 3.4 ounces are allowed in carry-on bags in reasonable quantities, even though they exceed the normal 3.4-ounce limit. You should declare them to the TSA officer at security and keep them in their original labeled containers. Pack them separately from your other liquids so they are straightforward to show.

Are e-cigarettes and vaping devices allowed in carry-on?

E-cigarettes and vaping devices are allowed in carry-on bags only. They are prohibited in checked luggage because the batteries pose a fire risk in the cargo hold. You must follow your airline's rules about where you can charge them and whether you can use them on the plane—most airlines prohibit use during flight.