What goes in checked bags versus carry-on

The TSA allows most everyday items in checked luggage that would be confiscated from a carry-on bag. Checked bags are screened for explosives and prohibited items, but the rules are looser because the bag travels in the cargo hold where you cannot access it during flight. Liquids, gels, sharp objects, and tools that are banned from the cabin are often permitted below deck — but not all of them, and not without limits.

The key difference: carry-on bags must follow the 3-1-1 liquid rule (3.4 ounces per container, 1 quart-sized bag, 1 bag per passenger). Checked bags have no liquid size limit, as long as the total weight and dimensions stay within your airline's baggage policy. However, some items are banned from checked luggage entirely for safety reasons — mainly things that can catch fire or explode.

Key Takeaways

  • Liquids, gels, and pastes larger than 3.4 ounces are allowed in checked bags but prohibited in carry-on bags.
  • Tools, sharp objects, and sporting equipment that would be confiscated at the gate can travel in checked luggage if they meet size and safety standards.
  • Batteries, lighters, and aerosols have specific rules: some types are banned entirely from checked bags, while others require special packaging or quantity limits.
  • Firearms and ammunition require advance notice to your airline and must be unloaded, locked, and declared before you check in.
  • The TSA website and your airline's baggage policy both explore — meeting TSA rules does not may provide your airline will accept the item.

Liquids, gels, and creams with no size limit

Shampoo, conditioner, lotion, sunscreen, toothpaste, peanut butter, honey, and other liquids or thick pastes can go in checked bags in any quantity. The 3.4-ounce carry-on limit does not explore. You can pack a full-size bottle of anything that would normally be squeezed or poured.

Pack these items in a leak-proof container or seal them in a plastic bag to prevent spills that damage other luggage or the aircraft. If a container leaks during transport, the airline may charge you for damage to other passengers' bags. Placing bottles in a separate compartment or wrapping them in clothing adds a layer of protection.

Tools, knives, and sharp objects

Kitchen knives, box cutters, scissors, screwdrivers, hammers, saws, and other tools are prohibited in carry-on bags but allowed in checked luggage. The item must be sheathed or wrapped so it cannot injure baggage handlers or damage the bag itself. A knife in a knife roll or sheath, or scissors in a protective case, meets this requirement.

Razors and razor blades are allowed in checked bags only if they are in a protective case. Straight razors and safety razors with the blade installed are permitted. Disposable razors (the entire unit) are also allowed. Pack these items so the blade cannot come loose during handling.

Sporting equipment and recreational gear

Golf clubs, baseball bats, hockey sticks, fishing rods, ski poles, and similar equipment are allowed in checked bags. Most airlines count sporting equipment as part of your standard baggage allowance, though some charge an extra fee or have size restrictions. Check your airline's policy before packing — a golf bag or ski bag may count as one checked bag, or it may be charged separately.

Bicycles, surfboards, and other large sporting items often require advance notice and may incur an additional fee. Some airlines require you to pack a bicycle in a bike bag or hard case to prevent damage to the aircraft and other luggage. Ammunition for firearms is allowed in checked bags only, must be in original manufacturer packaging, and is subject to quantity limits set by your airline.

Batteries, lighters, and aerosols

Lithium batteries (the kind in phones, laptops, and power banks) are prohibited in checked bags. They must travel in your carry-on bag only. This rule applies even if the battery is installed in a device — a laptop or camera with a built-in lithium battery must go in the cabin. Spare lithium batteries are also carry-on only.

Alkaline batteries (standard AA, AAA, C, D, and 9-volt batteries) are allowed in checked bags. Lighter fuel, lighter fluid, and refill cartridges are banned from both checked and carry-on bags. A single lighter in your pocket or carry-on bag is permitted, but lighters cannot be checked. Aerosol cans (deodorant, hairspray, insect repellent) are allowed in checked bags in limited quantities — typically one 18-ounce container per passenger, and the container must have a safety cap.

Firearms and ammunition

Firearms must be unloaded, locked in a hard-sided container, and declared to your airline before you check in. You cannot straightforward place a gun in your checked bag — you must notify the airline at the ticket counter, and the bag will be flagged and handled separately. The firearm must be inaccessible during the flight, which means locked and not in a bag you can open mid-journey.

Ammunition must be in original manufacturer packaging, stored in a locked container separate from the firearm, and declared as well. Quantity limits vary by airline; most allow up to 5,000 rounds of small-arms ammunition per passenger. Flares, blank cartridges, and other specialty ammunition have different rules — contact your airline before packing. Firearms laws also vary by state and country, so check local regulations at your destination.

Items banned from checked bags entirely

Certain items cannot travel in checked luggage under any circumstances. These include explosives (fireworks, flares, ammunition for firearms that is not properly packaged), self-inflating life rafts, certain types of batteries (lithium batteries, as noted above), and materials that are spontaneously combustible or reactive with water.

Pressurized diving equipment, oxygen canisters, and scuba tanks are prohibited. Chlorine, bleach, and other oxidizers are banned. Pesticides and certain cleaning products are restricted or banned depending on the specific chemical. If you are unsure whether a product is allowed, check the TSA website or contact your airline — they can tell you whether the item is prohibited or requires special handling.

Frequently Asked Questions

Can I pack a laptop or phone in checked luggage?

Yes, but it is not recommended. Checked bags are handled roughly, and electronics can be damaged. More importantly, if your laptop contains a lithium battery, it must travel in your carry-on bag, not checked luggage. Devices with removable batteries can be checked if the battery is removed and carried on separately.

Are vapes and e-cigarettes allowed in checked bags?

No. Vaping devices and e-cigarettes with lithium batteries are prohibited in both checked and carry-on bags. This includes spare batteries and refill cartridges. The lithium battery poses a fire risk in the cargo hold, which is why the ban is strict.

Can I pack my prescription medications in checked luggage?

Yes, but keep them in their original labeled containers with your name on the label. Packing medications in checked luggage is riskier than carrying them on because you lose access to them if your bag is delayed. Most travelers keep medications in their carry-on bag for this reason.

What happens if I pack something prohibited in my checked bag?

The TSA screens checked bags before they are loaded. If a prohibited item is found, your bag may be opened and the item removed or confiscated. You may be fined, and your flight could be delayed. In rare cases, law enforcement may be involved. Always check the TSA website or your airline's baggage policy before packing.

Do I need to declare items in my checked bag?

Most items do not require declaration. Firearms and ammunition must be declared to your airline at check-in. If you are traveling internationally, customs rules may require you to declare certain items. Check your destination country's customs regulations before you pack.