Checked luggage has strict rules about what goes inside

Airlines prohibit certain items from checked bags because they pose fire, safety, or security risks at altitude. The rules are set by the Transportation Security Administration (TSA) for U.S. flights, though international carriers and foreign airports have their own restrictions. Some items are banned entirely; others can go in carry-on bags but not checked luggage. Knowing the difference before you pack saves you from having items confiscated at the airport, delayed flights, or fines.

The core rule is straightforward: anything flammable, explosive, pressurized, or corrosive cannot go in checked bags. That includes everyday items you might not think twice about — lighters, certain batteries, aerosol cans, and some cosmetics. The reason is that checked baggage sits in an unpressurized cargo hold where a fire cannot be fought or controlled.

Key Takeaways

  • Lighters, matches, and flammable liquids are completely banned from checked bags on all U.S. flights, with no exceptions for "empty" containers.
  • Lithium batteries, including those in electronics and spare batteries, must stay in carry-on bags because they can overheat and ignite in cargo holds.
  • Aerosol cans — deodorant, hairspray, sunscreen, insect repellent — are prohibited in checked luggage even if partially used.
  • Corrosive substances like bleach, drain cleaner, and strong acids cannot be packed in checked bags under any circumstances.
  • Some items allowed in carry-on bags, like certain tools and sporting equipment, are still banned from checked luggage depending on the airline.

Lighters, matches, and all fire-starting devices

No lighters or matches of any kind are permitted in checked baggage on flights within, to, or from the United States. This includes disposable lighters, refillable lighters, and lighter fluid. Even a lighter you believe is empty will be confiscated. The TSA makes no exceptions for "just one" or for lighters you plan to use at your destination.

If you need a lighter at your destination, buy one after you arrive. If you smoke and use a lighter regularly, leave it at home or pack it in your checked bag only if your airline explicitly permits it on international routes — but most do not. Some international airlines allow one lighter in carry-on only, under strict conditions; check your airline's website before packing.

Lithium batteries and battery-powered devices

Spare lithium batteries — the kind in phones, laptops, and power banks — must go in your carry-on bag, never checked luggage. Lithium batteries can overheat, catch fire, and explode in the unpressurized cargo hold. This includes AA and AAA lithium batteries, 9-volt batteries, and any battery labeled "lithium metal" or "lithium ion."

Electronics with built-in batteries, like phones and laptops, are generally allowed in checked bags, but the TSA and most airlines recommend keeping them in carry-on instead. If you pack a laptop or phone in checked luggage, make sure it is powered off completely — not in sleep mode. Damaged batteries or devices with visible cracks should not be packed in checked bags at all; leave them behind or carry them on.

Power banks and external battery packs must go in carry-on luggage. Do not pack them in checked bags under any circumstances, even if they are new and sealed.

Aerosol cans and pressurized containers

Aerosol cans cannot go in checked luggage, period. This includes deodorant, hairspray, body spray, sunscreen, insect repellent, and air freshener. The pressurized contents can rupture in the cargo hold, leak into your other belongings, and create a fire hazard. The ban applies whether the can is full, partially used, or nearly empty.

If you need these items at your destination, buy them after you arrive or pack solid versions instead — solid deodorant, bar sunscreen, or a solid insect repellent stick. Some travelers pack aerosol cans in carry-on bags within limits (usually one or two small cans), but rules vary by airline, so check before you pack.

Flammable liquids and gels

Gasoline, paint thinner, acetone, and other flammable liquids are completely banned from checked luggage. So are nail polish, nail polish remover, perfume, and cologne in quantities over 70 ounces. Alcohol above 140 proof is also prohibited in checked bags.

Gel-based products like hair gel, aloe vera gel, and certain sunscreen gels fall into this category if they contain flammable solvents. Check the label; if it says "flammable" or lists alcohol as a main ingredient, it cannot go in checked luggage. Hand sanitizer with high alcohol content is also banned from checked bags.

For items you truly need, buy travel-size versions at your destination or check your airline's rules for carry-on limits. Some items like cologne are allowed in carry-on in small quantities but banned from checked bags entirely.

Corrosive and toxic substances

Bleach, drain cleaner, oven cleaner, and strong acids or bases cannot be packed in checked luggage. These substances can corrode the aircraft structure, damage other passengers' belongings, and create toxic fumes. The ban includes pool chemicals, rust remover, and any cleaning product labeled "corrosive" or "caustic."

Pesticides and certain medications also fall into this category. If you need to transport medication, check with your airline first — some prescription medications are restricted, and you may need documentation. Over-the-counter medications in their original containers are usually fine, but liquid medications with high alcohol content may be prohibited in checked bags.

Sporting equipment and tools with restrictions

Some items that seem harmless are banned from checked luggage by specific airlines. Certain tools — like power drills, saws, and nail guns — cannot go in checked bags on many carriers. Sporting equipment rules vary: golf clubs and tennis rackets are usually allowed, but some airlines restrict baseball bats, cricket bats, and hockey sticks in checked luggage.

Firearms and ammunition have their own strict rules and require advance notice to the airline. If you hunt or shoot and plan to travel with a gun, contact your airline at least 24 hours before your flight. Firearms must be unloaded, locked in a hard case, and declared at check-in. Ammunition must be in its original manufacturer's container and packed separately in checked luggage only.

Check your specific airline's website for their complete list of restricted sporting equipment. What one airline allows in checked bags, another may prohibit.

Frequently Asked Questions

Can I pack my phone or laptop in checked luggage?

Phones and laptops with built-in batteries are generally allowed in checked bags, but the TSA and airlines recommend keeping them in carry-on instead. If you do pack them in checked luggage, power them off completely — not sleep mode. Spare lithium batteries must always go in carry-on.

What if I need deodorant or sunscreen at my destination?

Buy these items after you arrive, or pack solid versions instead of aerosol or liquid forms. Solid deodorant sticks and bar sunscreen are not restricted. Travel-size bottles of sunscreen under 3.4 ounces can go in carry-on bags if you prefer to bring them.

Are there any exceptions to the lighter ban?

No. No lighters or lighter fluid are permitted in checked baggage on U.S. flights. Some international airlines allow one lighter in carry-on under specific conditions, but checked bags are never an option. Leave lighters at home or buy one at your destination.

Can I pack cologne or perfume in checked luggage?

Only if the bottle is 3.4 ounces or smaller and the alcohol content is below 70 percent. Larger bottles or higher-proof fragrances are banned from checked bags. Check the label for alcohol percentage before packing.

Do I need to declare firearms before my flight?

Yes. Firearms must be unloaded, locked in a hard case, and declared to the airline at check-in at least 24 hours before your flight. Ammunition must be in its original container and packed separately in checked luggage only. Contact your airline in advance for their specific requirements.