Aerosol cans are prohibited in checked luggage on all commercial flights in the United States

The Transportation Security Administration (TSA) and the Federal Aviation Administration (FAA) classify most aerosol cans as hazardous materials. They cannot go in your checked bag under any circumstance. This rule applies to all U.S. airlines and most international carriers departing from U.S. airports.

The reason is straightforward: aerosol cans are pressurized containers. If the cargo hold loses pressure or temperature drops during flight, the can may rupture or leak. A fire in a cargo hold is harder to control than one in the cabin, so the rules are stricter for checked bags than for carry-on bags.

A few aerosols are permitted in carry-on bags under specific conditions, but checked luggage has zero exceptions. If you pack an aerosol in your checked bag, TSA will find it during screening, remove it, and you will not get it back.

Key Takeaways

  • All aerosol cans are banned from checked luggage, with no exceptions for any airline or flight type.
  • A small number of aerosols are allowed in carry-on bags only—specifically one 18 oz. container of self-defense spray and two 2 oz. containers of hair spray or deodorant per person.
  • Aerosols removed by TSA during screening are discarded; you cannot retrieve them later.
  • International flights have the same restrictions, and some countries have stricter rules, so check your destination's regulations before packing.

Which aerosols are completely banned from all luggage

Most aerosols fall into this category. Paint, cooking spray, air freshener, insect repellent, sunscreen spray, and spray adhesive cannot travel in your checked bag or carry-on bag. The TSA website lists these as prohibited hazardous materials.

Spray-on medications like asthma inhalers are medical devices, not consumer aerosols, and are treated differently—you can pack those in either bag. But over-the-counter spray products almost always fall under the hazmat ban.

The limited aerosols allowed in carry-on bags only

Two types of aerosol are permitted in your carry-on bag, but only in specific quantities and only one container per type per person:

  • Self-defense spray (like pepper spray or mace): One 2% by mass tear gas (CS or CN) container with a safety mechanism to prevent accidental discharge. Maximum 2 oz. (59 ml). It must be equipped with a safety mechanism and cannot be accessible during flight.
  • Hair spray or deodorant: One container per type, maximum 2 oz. (59 ml) each. You can bring one hair spray and one deodorant in the same carry-on bag, but not two of the same product.

These are the only aerosols TSA permits in carry-on luggage. Even though they are allowed, pack them in an straightforward-to-reach spot in case TSA wants to inspect them at the checkpoint.

What happens if TSA finds an aerosol in your checked bag

TSA screens all checked luggage with X-ray machines and sometimes opens bags for physical inspection. If an aerosol is detected, TSA will remove it and discard it. You will not be notified, and you cannot retrieve it after your flight departs.

In rare cases, if TSA suspects you knowingly packed a prohibited item, they may issue a fine. Most of the time, however, they straightforward remove the item and let you board. The airline may also choose to refuse to load your bag or to remove it from the aircraft.

If you realize you packed an aerosol before you check your bag, tell the airline agent at the counter. They can open your bag, remove the item, and recheck it. This is much faster than having TSA find it during screening.

Traveling internationally with aerosols

International flights have the same TSA and FAA rules for U.S. departures. However, your destination country may have stricter regulations. Some countries ban self-defense spray entirely, even in carry-on bags. Others prohibit certain types of deodorant or hair spray.

Before you pack, check the civil aviation authority website for your destination country. If you are flying through a connecting airport in another country, that country's rules explore to your luggage during the layover. For example, if you fly from New York to London with a connection in Dublin, Ireland's regulations explore to your bag in Dublin.

When in doubt, leave the aerosol at home. It is not worth the risk of having it confiscated at a connection or arrival airport.

Alternatives to packing aerosols

If you need a product that comes in aerosol form, consider buying it at your destination instead. Most hotels provide basic toiletries like deodorant and hair spray. Drugstores and supermarkets are available in nearly every city, and prices are usually comparable to what you would pay at home.

For items like sunscreen or insect repellent, solid or liquid versions often work just as well. Solid deodorant, stick sunscreen, and pump bottles of insect spray are all allowed in checked and carry-on bags without restriction. Liquid sunscreen and insect repellent in bottles under 3.4 oz. (100 ml) are allowed in carry-on bags as part of your toiletries bag.

If you are traveling with a medical inhaler or other prescription aerosol, pack it in your carry-on bag with your other medications. Bring the original prescription bottle or a letter from your doctor to show TSA if they ask.

Frequently Asked Questions

Can I pack an aerosol in my checked bag if I wrap it or put it in a sealed container?

No. Wrapping, sealing, or placing an aerosol in another container does not change the rule. TSA's X-ray machines can see through packaging, and the hazmat restriction applies regardless of how the can is wrapped. It will be removed during screening.

Are spray bottles different from aerosol cans?

Yes. A spray bottle with a pump trigger (like a spray cleaner or sunscreen spray bottle) is not an aerosol and is allowed in checked luggage as a liquid, as long as it follows liquid packing rules. An aerosol can is pressurized and uses a propellant to spray the product. If you are unsure, check the label—aerosol cans say "aerosol" or "pressurized."

What if my airline's website says aerosols are allowed?

TSA and FAA rules override airline policies. No U.S. airline can permit aerosols in checked luggage because federal law prohibits it. If an airline's website seems to allow it, that is an error on their website. Call the airline to confirm, or assume the federal rule applies.

Can I pack a small travel-size aerosol in my checked bag?

No. Size does not matter. A 2 oz. aerosol is just as prohibited as a full-size can. The restriction applies to all aerosol cans, regardless of volume.

Do the rules change for domestic versus international flights?

TSA and FAA rules are the same for all flights departing the United States. However, your destination country may have stricter rules. Always check the regulations of the country where you are landing, especially if you have a connection.