Aerosol cans are banned from checked luggage on all commercial flights

You cannot bring aerosol cans in your checked bags on any U.S. commercial flight, regardless of what the can contains. The Federal Aviation Administration (FAA) and the Transportation Security Administration (TSA) prohibit all aerosols in checked luggage because pressurized containers can rupture, leak, or explode in the cargo hold where temperature and pressure changes are extreme and crew cannot respond quickly.

This rule applies even to common household items like deodorant, hairspray, sunscreen, and bug spray. The only exception is one 75 ml (2.5 oz) container of self-defense spray containing tear gas, which must have a safety mechanism to prevent accidental discharge and must be declared to the airline at check-in. All other aerosols—including cooking spray, paint, air freshener, and medical inhalers—are completely prohibited in checked bags.

Key Takeaways

  • All aerosol cans except one approved self-defense spray are banned from checked luggage on commercial flights.
  • Aerosols are prohibited in checked bags because pressurized containers can rupture or explode in the cargo hold.
  • You may pack some aerosols in your carry-on bag if they meet TSA size limits, though airline policies vary.
  • Prescription inhalers and epinephrine auto-injectors are allowed in carry-on bags but not in checked luggage.
  • If you need aerosol products at your destination, purchase them after you arrive rather than packing them.

Why the cargo hold makes aerosols dangerous

The cargo hold of an airplane is unpressurized and unheated. As the plane climbs, air pressure drops and temperature falls to well below freezing. These conditions cause the gas inside aerosol cans to expand, putting pressure on the metal container. If a can ruptures or leaks, the pressurized contents can ignite if they come into contact with electrical equipment or other cargo, creating a fire that crew cannot reach or extinguish in flight.

Even if a can does not rupture completely, a slow leak can spread flammable or toxic fumes throughout the cargo hold, contaminating other luggage and creating a hazard. This is why the FAA treats all aerosols as hazardous materials in checked baggage, with no exceptions for products you use every day at home.

Aerosols allowed in carry-on bags (with limits)

Some aerosols are permitted in your carry-on bag, but only in limited quantities and only if they meet TSA size requirements. A single container of personal-use aerosol deodorant, hairspray, or sunscreen may be carried on if it is 2 percent by mass of tear gas (self-defense spray) or does not exceed 2 ml (0.7 oz) for other aerosols. In practice, most travel-size aerosol cans fall within this limit.

However, individual airlines set their own carry-on rules and may be more restrictive than the TSA. Before packing any aerosol in your carry-on, check your airline's website or call their customer service line to confirm what they allow. Some airlines prohibit all aerosols in carry-on bags, while others allow one or two containers. Do not assume that TSA approval means your airline will permit it.

Medical aerosols and inhalers

Prescription inhalers for asthma or other respiratory conditions are allowed in carry-on bags and do not count toward your liquid or aerosol limits. You do not need to declare them, but it is helpful to keep them in their original labeled container so TSA agents can identify them quickly. Epinephrine auto-injectors (EpiPens) are also allowed in carry-on bags.

These medical devices are not permitted in checked luggage because crew cannot access them if you need them during flight. If you rely on an inhaler or auto-injector, always pack it in your carry-on bag and keep it with you throughout your journey, including during layovers.

What to do if you need aerosol products at your destination

The simplest solution is to purchase aerosol products after you arrive. Deodorant, hairspray, sunscreen, and other common aerosols are inexpensive and available at drugstores, supermarkets, and convenience stores in nearly every city. This approach costs less than paying for extra luggage and eliminates the risk of TSA confiscating items at security.

If you are traveling for a short trip, consider going without the product entirely. Many travelers find they need fewer personal care items when away from home than they expect. If you are checking luggage and want to pack these items, decant them into non-aerosol containers—solid deodorant, bar soap, or pump bottles—before you pack.

What happens if you pack an aerosol in checked luggage

If TSA discovers an aerosol can during baggage screening at the airport, the item will be confiscated and discarded. You will not be refunded for the product. In rare cases, if the aerosol is flammable or poses a serious hazard, TSA may delay your flight or refer the matter to law enforcement, though this is uncommon for everyday items like deodorant.

If an aerosol somehow makes it onto the plane and ruptures in the cargo hold, the flight may be diverted or delayed while crew addresses the hazard. This is why the rules are enforced strictly: a single pressurized container can create a serious safety risk for everyone on board.

Self-defense spray: the one exception

One 75 ml (2.5 oz) container of self-defense spray containing tear gas (such as pepper spray or mace) may be packed in checked luggage only. It must have a safety mechanism to prevent accidental discharge, and you must declare it to the airline at check-in. The container must be equipped with less than 2 percent by mass of tear gas.

This item is not allowed in carry-on bags under any circumstances. You cannot bring it through security or onto the plane with you. Some airlines may refuse to transport self-defense spray even in checked luggage, so contact your airline before packing it. If you are traveling to a destination where self-defense spray is illegal, do not pack it—you may face criminal charges when you arrive.

Frequently Asked Questions

Can I pack travel-size deodorant or hairspray in checked luggage?

No. All aerosol cans, including travel-size containers, are banned from checked luggage. You may pack a travel-size aerosol in your carry-on bag if it meets TSA size limits and your airline permits it, but checked bags are off-limits for all aerosols except one approved self-defense spray.

What if my prescription inhaler is in an aerosol form?

Prescription inhalers are allowed in carry-on bags and do not count toward aerosol limits. Keep it in your original labeled container and pack it in your carry-on so you have access to it during the flight. Do not pack it in checked luggage.

Will TSA let me bring sunscreen spray in my carry-on?

It depends on the size and your airline. TSA allows aerosol sunscreen in carry-on bags if it does not exceed 2 ml (0.7 oz), but your airline may have stricter rules. Check your airline's website or call before packing it to avoid having it confiscated at security.

Can I pack cooking spray or other kitchen aerosols?

No. Cooking spray, air freshener, paint, and all other non-medical aerosols are prohibited in both checked and carry-on bags. These items are considered hazardous materials and cannot fly on commercial aircraft under any circumstances.

What should I do if I forgot to remove an aerosol from my checked bag?

If you realize this before you check your bag, remove the item and either pack it in your carry-on (if permitted) or leave it behind. If you discover it after check-in, inform a TSA or airline agent when ready. The item will be confiscated, but reporting it yourself is better than having it discovered during baggage screening.