Aerosols are banned from checked bags on most airlines

You cannot pack most aerosols in checked luggage on commercial flights. The Federal Aviation Administration (FAA) and the Transportation Security Administration (TSA) prohibit pressurized aerosol cans in checked bags because they can rupture, leak, or explode during flight due to changes in cabin pressure and temperature. This applies to flights within the United States and most international routes.

The only aerosols allowed in checked bags are those containing certain hazardous materials under strict conditions — and even then, only if the airline permits them. Most passengers will find that their aerosols either go in a carry-on bag (with limits) or cannot fly at all.

Key Takeaways

  • Deodorant, hairspray, sunscreen, and insect repellent are banned from checked luggage on all commercial flights.
  • A small number of aerosols — like certain personal safety devices and some medical inhalers — may be allowed in checked bags under specific airline rules, but you must contact your airline in advance.
  • You can pack limited quantities of some aerosols in carry-on bags: one 3.4-ounce container of each type, and no more than two liters total across all aerosols.
  • Aerosols that are flammable, corrosive, or oxidizing are never permitted in any luggage on a plane.

Why aerosols cannot go in checked bags

Checked luggage sits in the cargo hold, where temperature and air pressure drop significantly during flight. Aerosol cans are sealed containers filled with pressurized gas. When external pressure drops, the pressure inside the can becomes greater than the pressure outside, which can cause the seal to fail. The can may leak, rupture, or explode — and if it does, the contents can damage other luggage, contaminate cargo, or create a fire hazard.

The risk is real enough that the FAA treats aerosols as hazardous materials for air transport. Even a small leak from a single can of hairspray or deodorant can spread fumes through the cargo hold and affect the safety of the flight.

What aerosols are completely banned

These items cannot go in checked bags or carry-on bags on any commercial flight:

  • Deodorant and antiperspirant spray
  • Hairspray
  • Body spray and cologne
  • Sunscreen spray
  • Insect repellent spray
  • Air freshener
  • Cooking spray
  • Paint, varnish, or lacquer
  • Flammable adhesives or glues
  • Cleaning products in aerosol form
  • Any aerosol marked "flammable" or "combustible"

If an aerosol product has a warning label that says "flammable," "combustible," "corrosive," or "oxidizing," it is banned from all luggage. Check the label on the can itself — if you are unsure, do not pack it.

Aerosols that may be allowed in checked bags

A very small number of aerosols can go in checked luggage if your airline permits them. These include certain personal safety devices (like bear spray or self-defense sprays) and some medical inhalers or nebulizers. However, these items have strict rules: they must be equipped with a safety mechanism to prevent accidental discharge, they must be declared to the airline in advance, and the airline must approve them before you book or check your bag.

Do not assume your airline allows these items. Call the airline's baggage or hazmat department before you pack. They will tell you whether the specific product is permitted and what documentation or declaration you need to provide at check-in. Some airlines allow them; others do not.

Aerosols in carry-on bags: the limits

You can bring some aerosols in your carry-on bag, but only in small quantities. The TSA allows one 3.4-ounce (100 milliliter) container of each type of aerosol product — such as one can of deodorant, one can of hairspray, and one can of sunscreen. The total volume of all aerosols combined cannot exceed two liters (about 67 ounces).

The aerosol must fit inside your quart-sized clear plastic bag along with other liquids and gels. Pack it where TSA officers can easily remove it for screening. If you exceed the size or quantity limits, the aerosol will be confiscated at security.

Alternatives to packing aerosols

If you need deodorant, sunscreen, or other products at your destination, consider buying solid or gel versions instead. Solid deodorant, stick sunscreen, and cream-based insect repellent are not aerosols and can go in checked or carry-on bags without restriction. Many drugstores and supermarkets at your destination carry these products, so you can also wait and buy them when you arrive.

For hairspray and other styling products, travel-size solid alternatives exist, or you can purchase a small bottle at your destination. This approach often costs less than paying baggage fees and eliminates the risk of packing something that will be confiscated.

What happens if you pack aerosols in checked luggage

If TSA or baggage handlers discover an aerosol in your checked bag, the item will be removed and discarded. You will not be refunded for it. If the aerosol has already leaked or ruptured, it may damage other items in your bag, and the airline is not responsible for that damage.

In rare cases, if an aerosol poses a serious safety risk or if you knowingly packed a banned item, you could face fines or other penalties. It is not worth the risk — pack only what is permitted, or leave aerosols at home.

Frequently Asked Questions

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

No. Even travel-size aerosol deodorant is banned from checked luggage. If it is in aerosol form (spray), it cannot go in any luggage on a plane. Switch to a solid stick deodorant, or buy deodorant at your destination.

What if my aerosol is not flammable?

It does not matter. The FAA bans aerosols from checked bags because of the pressure and temperature changes in the cargo hold, not just because of flammability. Even non-flammable aerosols can rupture and leak. All pressurized aerosol cans are prohibited in checked luggage.

Can I pack an inhaler or asthma medication in my checked bag?

Inhalers and nebulizers are medical devices, not consumer aerosols, and the rules are different. You can pack them in carry-on or checked bags, but it is safer to keep them in your carry-on so you have access to them during the flight. Bring a copy of your prescription or a letter from your doctor if you are concerned about security screening.

Do international flights have different rules for aerosols?

Most international flights follow the same FAA and TSA rules for flights departing from the United States. However, some countries have stricter rules for flights arriving in their territory. Check with your destination country's aviation authority and your airline before you pack. Rules vary by country and airline.

What if I forgot and packed an aerosol in my checked bag?

Contact your airline as soon as you realize the mistake. If your flight has not departed, they may be able to remove the item before the plane takes off. If the flight has already left, the item will be discovered during baggage handling and discarded. Do not attempt to retrieve it from your checked bag after check-in.