Banned items in checked bags: the core list
The TSA bans certain items from checked luggage entirely — they cannot go in your suitcase under the plane, and most cannot go in your carry-on either. The largest categories are flammables (lighters, fuel, paint thinner), compressed gases (propane, oxygen bottles, some aerosols), oxidizers (bleach, pool chemicals), and explosives or weapons (ammunition, fireworks, realistic replica guns). A smaller but important group includes toxic substances (pesticides, some cleaning products) and radioactive materials (certain medical or industrial items).
Beyond federal TSA rules, individual airlines add their own restrictions. Some ban lithium batteries entirely from checked bags; others allow them under specific conditions. Some prohibit e-cigarettes and vaping devices in checked luggage but allow them in carry-on. Before you pack, check your airline's website — the rules differ between carriers, and what one airline permits another may forbid.
Key Takeaways
- Flammables, compressed gases, and explosives are banned from checked luggage under federal law and cannot fly in your suitcase under any circumstances.
- Lithium batteries, e-cigarettes, and certain medical devices have airline-specific rules that vary by carrier, so check your airline's policy before packing.
- Items that are legal to own — like certain tools, sports equipment, or household chemicals — may still be prohibited in checked bags because of fire or pressure risks at altitude.
- Some items banned from checked luggage are allowed in carry-on bags under stricter limits, so moving them to your personal bag may be an option.
- The TSA website lists prohibited items by category, and your airline's baggage policy page will show what they specifically restrict beyond federal rules.
Flammables and fuels you cannot pack
Lighters are the most common flammable item people try to pack. Standard butane lighters are banned from both checked and carry-on bags. Zippo-style lighters are also prohibited in checked luggage, though you may carry one in your personal item if it has no fuel and is placed in a clear plastic bag — this exception is narrow and airline-dependent, so confirm before you board.
Fuel of any kind — gasoline, diesel, lighter fluid, camp stove fuel — cannot go in checked bags. Paint thinner, acetone, and other solvents used for cleaning or finishing are also prohibited. Aerosol cans present a gray area: some aerosols (like deodorant or hairspray) are allowed in limited quantities in checked bags, while others (like spray paint or insecticide) are banned entirely. The rule depends on whether the aerosol is flammable and what it contains, so read the label or contact your airline if you are unsure.
Batteries and electronics with power sources
Lithium batteries — the rechargeable kind in phones, laptops, and power banks — are heavily restricted. Most airlines allow lithium batteries in carry-on bags only, not in checked luggage, because they can overheat and catch fire in the cargo hold's lower air pressure and temperature swings. Spare lithium batteries must be in your personal bag, and some airlines cap the number you can bring.
E-cigarettes and vaping devices are banned from checked bags by most major carriers because they contain lithium batteries. Some airlines prohibit them entirely, even in carry-on. Hoverboards, self-balancing scooters, and certain mobility devices with lithium batteries are also typically banned from checked luggage and sometimes from carry-on as well. If you rely on a powered mobility device, contact your airline weeks ahead — they often require advance notice and may have specific packing instructions.
Laptop computers, tablets, and other large electronics with lithium batteries should travel in your carry-on bag, not checked. This protects them from damage and keeps them within the airline's battery rules. Devices with non-rechargeable alkaline batteries (like some flashlights or remote controls) are generally permitted in checked bags.
Weapons, ammunition, and realistic replicas
Firearms and ammunition cannot go in checked luggage without advance declaration and specific packing procedures that vary by airline. Most carriers require you to notify them 24 hours before arrival, pack the firearm unloaded in a locked hard-sided container, and place ammunition in a separate locked container. Some airlines do not allow firearms at all. This is not a casual packing decision — contact your airline directly and follow their exact steps.
Realistic replica guns, airsoft guns, and toy guns that look like real weapons are banned from checked bags on most airlines. Even if they are toys, TSA and airline staff cannot easily tell the difference, and the risk of mishandling during security or loading is too high. Paintball guns and compressed-air rifles fall into the same category.
Knives, box cutters, and other sharp objects are prohibited in carry-on bags but are sometimes allowed in checked luggage under specific conditions — usually packed so they cannot cause injury during handling. Sporting equipment like baseball bats, hockey sticks, and golf clubs are typically allowed in checked bags but banned from carry-on. Check your airline's policy on these items, as rules vary.
Chemicals and hazardous household items
Bleach, drain cleaner, oven cleaner, and other corrosive cleaning products cannot go in checked luggage. Pesticides, insecticides, and weed killers are also banned. Pool chemicals like chlorine tablets are prohibited. These items are classified as hazardous materials because they can damage the aircraft or harm people if they leak or spill during flight.
Paint, paint thinner, and varnish are banned. Nail polish and nail polish remover (acetone) are prohibited in checked bags, though some airlines allow small quantities of nail polish in carry-on under strict limits. Perfume and cologne in large bottles may be restricted; check your airline's rules on alcohol-based liquids in checked bags, as some allow them and others do not.
Certain medications and medical supplies have restrictions. Insulin and other injectable medications are usually allowed, but syringes must be packed with the medication they are meant for. Thermometers containing mercury are banned. If you travel with prescription medications, pack them in their original labeled containers and keep them in your carry-on bag, not checked luggage, to avoid loss and to have them available if you need them.
Sports equipment and tools with restrictions
Scuba tanks and diving equipment with compressed air or oxygen cannot go in checked bags. Propane or butane camping stoves and fuel canisters are banned. Certain tools — like power drills with lithium batteries, some nail guns, or tools containing flammable propellants — are prohibited in checked luggage. Hand tools like hammers, screwdrivers, and wrenches are usually allowed in checked bags but banned from carry-on.
Sporting goods rules vary widely. Baseball bats, cricket bats, and hockey sticks are typically allowed in checked bags but not carry-on. Ski poles and golf clubs follow the same pattern. Surfboards and fishing rods are often allowed but may incur an extra fee. Bicycles are usually permitted in checked bags if they are properly packed in a hard case or bike bag, though some airlines charge a fee. Before packing any sporting equipment, confirm with your airline that it is allowed and whether you will be charged.
Items that seem harmless but are still banned
Certain items are prohibited not because they are dangerous in everyday use, but because of the unique environment of an aircraft. Dry ice is banned from both checked and carry-on bags because it sublimates (turns to gas) and can build pressure in a sealed container. Matches and lighters fall into this category — they are legal to own, but the pressure and temperature changes in a cargo hold create a fire risk.
Realistic-looking toy guns and replica weapons are banned even though they are toys, because TSA and airline staff cannot safely distinguish them from real weapons during handling. Certain types of air fresheners and odor eliminators that contain flammable propellants are prohibited. Some personal care items like certain types of sunscreen or insect repellent in aerosol form are restricted if they are flammable.
Magnetic items are sometimes restricted in checked bags — very strong magnets can interfere with aircraft navigation and communication systems. If you are packing an item with a magnet, check your airline's policy. Certain scientific or medical equipment, even if it seems harmless, may be prohibited if it contains radioactive material or other hazardous substances.
How to find out what your specific airline allows
The TSA website (tsa.gov) has a searchable database called "What Can I Bring?" where you can type in an item and see federal rules. This tells you what the law allows, but your airline may be stricter. Every major carrier — United, American, Delta, Southwest, and others — publishes a baggage policy page on their website that lists what they specifically prohibit in checked bags.
If you are unsure about a specific item, contact your airline's customer service before you pack. Many airlines have chat or phone support that can answer in minutes. If you pack something prohibited and it is discovered at the airport, TSA will confiscate it, and you may face delays or fines. Taking five minutes to check ahead saves frustration and money.
Frequently Asked Questions
Can I pack a lighter in my checked bag if it has no fuel?
No. Even empty lighters are banned from checked luggage under federal law. A lighter with no fuel is still prohibited because TSA considers the device itself a hazard. Lighters are not allowed in checked bags under any circumstances.
What if my medication has a needle or syringe?
Syringes and needles are allowed in checked bags if they are packed with the medication they are meant for and the medication is in its original labeled container. Keep the medication in your carry-on bag instead if possible, so you have it available during the flight and it is not at risk of being lost.
Are power banks allowed in checked luggage?
No. Power banks contain lithium batteries and are banned from checked bags on most airlines. They must go in your carry-on personal item. Check your airline's policy on the number of power banks you can bring, as some limit you to one or two.
Can I pack a baseball bat in my checked bag?
Yes, baseball bats are typically allowed in checked luggage but banned from carry-on bags. Pack it in your checked suitcase, not your personal bag. Some airlines charge an extra fee for sporting equipment, so confirm your airline's policy and any fees before you arrive at the airport.
What happens if I accidentally pack a prohibited item?
TSA will find it during screening and confiscate it. You will not be charged a fine in most cases, but you will lose the item. If the item is dangerous, you may face additional questioning or delays. It is always better to check the rules ahead of time than to discover a problem at the airport.