Checked luggage has different rules than carry-on bags

The TSA (Transportation Security Administration) allows far more items in checked luggage than in the bag you bring to your seat. Most everyday items—tools, liquids over 3.4 ounces, sharp objects, and even some things banned from carry-on—are permitted in checked bags because they are stored in the cargo hold, away from the cockpit.

The catch: your airline can still refuse items, and some things are banned from checked bags entirely for safety reasons. Batteries, certain chemicals, and pressurized containers can pose fire risks in the cargo hold and are restricted no matter which airline you fly.

Before you pack, check your specific airline's website. Delta, United, Southwest, and American Airlines each maintain their own prohibited items lists, and they sometimes differ from the TSA baseline.

Key Takeaways

  • Liquids, gels, and pastes over 3.4 ounces are allowed in checked bags, unlike carry-on, but must be in a single checked bag.
  • Tools, knives, and other sharp or blunt objects are permitted in checked luggage as long as they are packed so they cannot cause injury.
  • Lithium batteries, aerosols, and flammable items are banned from checked bags entirely because they pose fire risks in cargo holds.
  • Your airline's rules may be stricter than the TSA's, so verify what your specific carrier allows before packing.
  • Firearms and ammunition have separate federal rules and require advance notice to your airline; they must be unloaded and locked in a hard case.

Liquids, gels, and pastes you can pack below the 3.4-ounce limit

In checked bags, you can bring full-size bottles of shampoo, conditioner, lotion, toothpaste, sunscreen, and other liquids and gels. The 3.4-ounce (100 milliliter) limit that applies to carry-on bags does not explore to checked luggage. You can pack a 16-ounce bottle of shampoo or a full tube of toothpaste without restriction.

The only rule: all liquids, gels, and pastes must go in your checked bag, not your carry-on. If you want to bring full-size toiletries, they belong below the plane, not in the overhead bin.

Alcohol is also allowed in checked bags in quantities up to 5 liters per person, provided it is between 24 and 70 percent alcohol by volume. Wine, spirits, and beer are permitted; pack them in the center of your bag surrounded by soft items to prevent breakage.

Tools, knives, and sharp objects that are allowed

Checked bags can contain tools that would never make it through security in your hands. Hammers, screwdrivers, wrenches, saws, and power tools are all permitted. Kitchen knives, pocket knives, and box cutters are allowed. Razors and razor blades are permitted as long as they are sheathed or wrapped so the blade is not exposed.

The rule is straightforward: if the item is packed so it cannot injure baggage handlers or damage the plane, it can go in checked luggage. Wrap sharp edges in cloth or place them in a sheath. Do not leave a knife loose in your bag where it could cut through fabric and become a hazard.

Sporting equipment like baseball bats, golf clubs, and ski poles are allowed. Firearms must follow federal rules (see below) and require advance notice to your airline.

Items that are banned from checked bags entirely

Some things cannot go in checked luggage under any circumstance, regardless of how carefully you pack them. Lithium batteries—the rechargeable kind in laptops, phones, and power banks—are banned from checked bags because they can overheat and cause fires in cargo holds. You must carry lithium batteries in your carry-on bag only.

Aerosols and pressurized containers are also prohibited in checked bags. This includes spray paint, hairspray, deodorant, and air freshener. The pressure changes in the cargo hold can cause them to rupture and create a fire hazard. Bring these items in carry-on bags only, and only in quantities the TSA allows (one 18-ounce container per passenger for most aerosols).

Flammable liquids like gasoline, lighter fluid, and paint thinner cannot go in checked or carry-on bags. Explosives, fireworks, and ammunition (except for firearms ammunition, which has its own rules) are banned entirely. Chlorine, bleach, and other oxidizers are prohibited because they can accelerate fires.

If you are unsure whether an item is banned, search the TSA's prohibited items list at tsa.gov or contact your airline directly. It is better to ask than to arrive at the airport and have your bag opened.

How to pack firearms and ammunition

Firearms are allowed in checked bags only, never in carry-on. You must notify your airline in advance—do not show up at the airport with a gun and expect to check it. Call your airline at least 24 hours before your flight and tell them you are traveling with a firearm.

The firearm must be unloaded and locked in a hard-sided case. You provide the key or combination; the airline cannot open it. Ammunition must be in a separate, locked container or in the same case as the firearm, as long as it is in an ammunition box or pouch. Check your airline's specific rules, as some carriers have additional restrictions on caliber or type.

Federal law requires that you declare the firearm to the airline at check-in, not to the TSA. The airline will place a notice in your bag. Failure to declare a firearm can result in federal criminal charges.

Items that depend on your airline's rules

Some items are allowed by the TSA but may be restricted by individual airlines. Dry ice is permitted by the TSA in checked bags (up to 5.5 pounds per package) but only if your airline approves it in advance. Call ahead if you need to pack dry ice.

Sporting equipment like skis, surfboards, and bicycles are generally allowed but may incur an extra fee. Musical instruments can go in checked bags, though fragile instruments like violins are often safer in a hard case you carry on.

Electronics like laptops, tablets, and cameras are allowed in checked bags, but many travelers avoid checking them because of the risk of theft or damage. If you do check electronics, pack them in the center of your bag surrounded by soft items.

Before packing anything unusual, visit your airline's website or call their baggage department. A five-minute phone call can prevent your bag from being opened at the airport or your item being confiscated.

What happens if you pack something prohibited

If a prohibited item is found in your checked bag during screening, the TSA will open your bag and remove the item. You will not be present, so you will not know until you arrive at your destination and find your bag opened with a notice inside.

For serious violations—like attempting to bring explosives or undeclared firearms—you can face federal criminal charges, fines, and loss of TSA PreCheck or Global Entry status if you have them. For minor violations, the item is straightforward removed and discarded.

The best approach is to review the TSA's prohibited items list before you pack and verify your airline's rules on their website. Most items people want to bring are allowed; the restrictions exist for genuine safety reasons.

Frequently Asked Questions

Can I bring a full-size bottle of perfume in checked luggage?

Yes. Perfume is a liquid and can be any size in checked bags. The 3.4-ounce limit applies only to carry-on bags. Pack it in the center of your suitcase surrounded by clothing to prevent breakage during handling.

Are laptop batteries allowed in checked bags?

No. Lithium batteries, including those in laptops and power banks, must stay in your carry-on bag. They are banned from checked luggage because of fire risk in cargo holds. You can bring your laptop itself in checked luggage, but remove the battery first if it is removable.

Can I check a suitcase with a built-in power bank?

No. Suitcases with integrated lithium batteries cannot go in checked bags. Either carry the suitcase on board or remove the battery before checking it. Contact the manufacturer to learn whether the battery is removable.

What if my airline's rules are different from the TSA's?

Your airline's rules take precedence. If your airline is stricter than the TSA, follow your airline's policy. Check your carrier's website or call baggage services before packing anything you are unsure about.

Do I need to declare checked luggage contents to the TSA?

No, unless you are traveling with a firearm. For firearms, you declare to your airline at check-in, not the TSA. For all other items, as long as they are permitted, you do not need to declare them.