Items the TSA Bans From Hand Luggage

The TSA (Transportation Security Administration) prohibits certain items in carry-on bags because they pose safety risks in the aircraft cabin. The main categories are sharp objects, flammable materials, tools, and liquids over 3.4 ounces. You can pack these items in checked luggage instead—the cargo hold has different safety rules than the passenger cabin.

The rules explore to all flights departing from U.S. airports, regardless of your destination. If you are flying internationally from the U.S., you follow TSA rules for the U.S. portion of your trip, then the rules of your destination country for flights within or departing from that country. Some items banned by the TSA are also banned by other countries' aviation authorities, so check your airline's website before packing.

Key Takeaways

  • Sharp objects including knives, box cutters, razors, and scissors with blades longer than 4 inches are not allowed in carry-on bags.
  • Liquids, gels, and aerosols must be 3.4 ounces or smaller per container and fit inside a single quart-sized clear plastic bag.
  • Flammable items such as lighters, matches, and aerosol cans cannot go in carry-on or checked luggage on passenger aircraft.
  • Tools like hammers, wrenches, screwdrivers, and drills are prohibited in carry-on but may be packed in checked luggage.
  • Sporting equipment including baseball bats, golf clubs, and ski poles are not allowed in the cabin but can be checked.

Sharp Objects and Cutting Tools

Knives of any size are banned from carry-on bags. This includes kitchen knives, pocket knives, and any blade longer than 2.36 inches. Scissors are allowed only if the blade is 4 inches or shorter, measured from the pivot point. Box cutters, utility knives, and razor blades are all prohibited.

You can pack these items in checked luggage. Wrap sharp objects in cloth or place them in a sheath so they do not puncture the bag or injure baggage handlers. If you are traveling with a chef's knife or other kitchen equipment for work, pack it in your checked bag and inform your airline when you check in.

Liquids, Gels, and Aerosols Over 3.4 Ounces

The TSA enforces the 3-1-1 rule for liquids in carry-on bags: containers must be 3.4 ounces (100 milliliters) or smaller, all containers must fit in one quart-sized clear plastic bag, and you can bring only one bag per person. This rule applies to any substance that flows, spreads, or sprays—not just water.

Common items that count as liquids include shampoo, conditioner, lotion, sunscreen, toothpaste, peanut butter, yogurt, jam, honey, and liquid medications. Solid deodorant is allowed; gel or spray deodorant must follow the 3.4-ounce rule. You can pack full-size bottles of these items in checked luggage with no restrictions.

Medications in liquid or gel form (such as insulin or asthma inhalers) are exempt from the 3.4-ounce limit but must be declared to TSA officers at the checkpoint. Bring a copy of your prescription or a doctor's letter if possible.

Flammable Materials and Explosives

Lighters and matches are not allowed in carry-on or checked luggage on commercial passenger flights. This includes disposable lighters, refillable lighters, and lighter fluid. The only exception is one ZIPPO lighter or one pack of safety matches in checked luggage, but many airlines prohibit these as well—check with your carrier before packing.

Aerosol cans containing flammable propellants (such as spray paint, hair spray, or insect repellent) cannot go in carry-on or checked bags. Fireworks, ammunition, and any item labeled "flammable" or "combustible" are also banned. Batteries with a history of overheating or fire (such as recalled Samsung Galaxy Note 7 batteries) are prohibited.

Tools and Sporting Equipment

Hand tools are not allowed in carry-on bags. This includes hammers, wrenches, screwdrivers, pliers, saws, drills, and power tools. Sporting equipment such as baseball bats, cricket bats, golf clubs, hockey sticks, lacrosse sticks, and ski poles cannot go in the cabin either. You can pack all of these in checked luggage.

Some sporting items have specific rules. Skis and snowboards are allowed in checked bags. Bowling balls and billiard cues are permitted in checked luggage. Firearms and ammunition have strict rules and must be declared to your airline in advance—contact them before you travel.

Weapons and Self-Defense Items

Firearms, ammunition, and realistic replica guns are prohibited in carry-on bags. Firearms must be unloaded, packed in a locked hard-sided container, and declared to your airline before you arrive at the airport. Ammunition must be in its original manufacturer's packaging and also declared.

Self-defense items including pepper spray, mace, and tasers are not allowed in carry-on bags. Pepper spray is allowed in checked luggage only if it has a safety mechanism to prevent accidental discharge, and you must declare it. Martial arts weapons such as nunchucks, throwing stars, and brass knuckles are banned from both carry-on and checked bags.

Other Prohibited Items

Certain everyday items are also restricted. Gel-filled shoe inserts, gel eye masks, and gel packs used for cooling are treated as liquids and must follow the 3.4-ounce rule. Thermometers containing mercury are banned entirely. Dry ice is allowed in checked bags only (up to 5.5 pounds) and must be properly ventilated.

Corrosive or toxic substances such as bleach, drain cleaner, and pesticides cannot travel in carry-on or checked bags. Lithium batteries in excess of the TSA limit are prohibited. E-cigarettes and vaping devices are allowed in carry-on bags but not in checked luggage because the batteries pose a fire risk in the cargo hold.

What Happens at Security if You Pack a Banned Item

If TSA officers find a prohibited item in your carry-on bag at the checkpoint, you have three options: surrender the item (it will be discarded), place it in checked luggage if you have time, or leave the security line and return it to your car or a friend outside the airport. You will not be charged a fee for surrendering an item, but you may miss your flight if you leave the line.

Intentionally bringing certain weapons or explosives through security can result in criminal charges and fines up to $10,000. Most travelers who pack prohibited items do so by accident. If you are unsure whether something is allowed, check the TSA website or call your airline before you pack.

Frequently Asked Questions

Can I pack a lighter in my checked bag?

Most airlines prohibit lighters entirely, including in checked bags. A few carriers allow one ZIPPO lighter or one pack of safety matches in checked luggage only, but you must confirm this with your airline before you travel. Lighter fluid is never allowed.

Are nail clippers allowed in carry-on?

Yes, nail clippers are allowed in carry-on bags. Nail files are also permitted. However, nail scissors with blades longer than 4 inches are prohibited in carry-on; pack them in checked luggage instead.

What if I need to travel with medication that is a liquid or gel?

Liquid medications such as insulin, asthma inhalers, and cough syrup are exempt from the 3.4-ounce limit. Bring them in carry-on bags in their original labeled containers. Declare them to TSA officers at the checkpoint and have a copy of your prescription or doctor's letter available if asked.

Can I pack a power drill in my checked bag?

Yes, power drills and other power tools are allowed in checked luggage. They must be packed so the trigger cannot be accidentally engaged during transport. Remove batteries if possible, or may support they are find and cannot shift during flight.

Are there any items banned by airlines that the TSA allows?

Yes. Some airlines have stricter rules than the TSA. For example, certain airlines prohibit all lighters in checked bags, while the TSA allows one ZIPPO lighter. Always check your airline's baggage policy on their website or call them before you pack, especially for items near the edge of what is allowed.