Aerosol cans are banned from checked luggage on all commercial flights

You cannot pack aerosol cans in your checked bag on any airline flying in the United States or internationally. 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 occur.

This rule applies to every type of aerosol: deodorant, hairspray, shaving cream, sunscreen spray, insect repellent, cooking spray, and paint. There are no exceptions based on brand, size, or how full the can is. If the product comes in an aerosol container with a spray nozzle, it cannot go in your checked bag.

The only way to travel with aerosols is to leave them at home, buy them at your destination, or pack them in your carry-on bag—but carry-on rules are stricter still, and most aerosols are prohibited there too.

Key Takeaways

  • All aerosol cans are banned from checked luggage, regardless of contents or size.
  • Most aerosols are also banned from carry-on bags, with limited exceptions for toiletries like deodorant and hairspray in containers under 3.4 ounces.
  • The safest option is to pack aerosol products in your checked bag only after your flight arrives, or to purchase them at your destination.
  • Violations can result in fines, confiscation, flight delays, or being denied boarding.

Why aerosols are prohibited in checked luggage

Checked baggage sits in an unpressurized cargo hold where temperature and air pressure drop significantly during flight. Aerosol cans are designed to maintain pressure at ground level; when external pressure drops, the pressure inside the can increases. This pressure buildup can cause the can to leak, rupture, or explode—potentially damaging the aircraft, other luggage, or creating a fire hazard.

Even a small leak from a single aerosol can contaminate the entire cargo hold and create dangerous fumes. A rupture can damage the plane's structural integrity or electrical systems. Because the cargo hold is not monitored during flight, crew members cannot respond to a problem until the plane lands.

The TSA and FAA treat this as a safety issue, not a convenience rule. Airlines have no discretion to allow aerosols in checked bags, and no airline will make an exception.

What counts as an aerosol

An aerosol is any product dispensed from a pressurized container using a spray nozzle or button. This includes obvious items like deodorant and hairspray, but also products you might not think of as aerosols: cooking spray, sunscreen spray, insect repellent spray, air freshener, spray paint, brake cleaner, and compressed air dusters.

Pump sprays (like spray bottles of cleaning solution) are not aerosols and are allowed in checked luggage. Gels, creams, liquids in non-pressurized containers, and solid products are also allowed. The key difference is whether the product relies on internal pressure to spray.

If you are unsure whether a product is an aerosol, check the label. Aerosol containers are labeled "Aerosol" or "Pressurized Container" and have a warning about not exposing them to heat or puncturing them.

Limited aerosol exceptions for carry-on bags

A small number of aerosols are permitted in carry-on bags under strict limits. You may bring one 3.4-ounce (100 milliliter) container each of aerosol deodorant, hairspray, and perfume in your carry-on. These must fit in a single quart-sized clear plastic bag along with other liquids and gels. Aerosol sunscreen is also allowed in carry-on bags in the same 3.4-ounce limit.

All other aerosols—including cooking spray, insect repellent, air freshener, and any spray paint or industrial products—are prohibited in carry-on bags as well as checked bags. Even the permitted aerosols must be under 3.4 ounces; a full-size deodorant can or hairspray bottle will be confiscated at security.

These carry-on exceptions exist because the flight deck is pressurized and monitored, and crew can respond when ready if a problem occurs. The cargo hold has neither advantage, which is why no aerosols are allowed there under any circumstance.

What happens if you pack an aerosol in checked luggage

If TSA screeners detect an aerosol in your checked bag during X-ray screening, the bag will be flagged and removed from the conveyor. You will be notified, and the aerosol will be confiscated. You will not be refunded for the product.

If an aerosol is not detected at the airport and ruptures or leaks in the cargo hold during flight, the airline may assess you for damage to other passengers' luggage or the aircraft itself. You could also face a fine from the FAA for violating hazardous materials regulations. In serious cases, you may be denied boarding on future flights or banned from the airline.

The TSA and FAA take this rule seriously because the consequences of a pressurized container failing at altitude are severe. It is not worth the risk of a fine, confiscation, or legal action.

Practical alternatives for traveling with aerosols

The simplest option is to leave aerosol products at home and buy them at your destination. Most hotels provide basic toiletries like deodorant and hairspray, and drugstores, supermarkets, and convenience stores in any city sell these items cheaply. If you are traveling for a short trip, this is usually the easiest route.

If you need a specific product and cannot buy it at your destination, pack it in your checked bag after you arrive. Buy the aerosol at your destination airport or a local store, and pack it in your checked bag for your return flight. This way, the can travels in checked luggage only during the final leg home, when the cargo hold is pressurized during landing and unloading.

For carry-on travel, remember the 3.4-ounce limit for deodorant, hairspray, perfume, and sunscreen spray. Measure your container before packing, or buy travel-size versions at a drugstore. These small sizes are inexpensive and designed specifically for air travel.

International flights and other countries' rules

International airlines and non-U.S. carriers follow the same rules as U.S. airlines because aerosol restrictions are set by the International Air Transport Association (IATA) and adopted by aviation authorities worldwide. Whether you are flying from the United States to Europe, Asia, or anywhere else, aerosols are prohibited in checked luggage.

Some countries have additional restrictions on what you can bring into the country itself. For example, some nations restrict certain types of spray paint or insect repellent. Check the customs rules for your destination country before packing, but assume that any aerosol will be confiscated at the airport if you attempt to pack it in checked luggage.

Frequently Asked Questions

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

No. Size does not matter—even a small travel-size aerosol is prohibited in checked luggage. You may pack a travel-size deodorant or hairspray in your carry-on bag only if it is 3.4 ounces or smaller. Checked bags cannot contain any aerosol, regardless of size.

What if I wrap the aerosol can in bubble wrap or put it in a plastic bag?

Wrapping does not change the rule. The aerosol can is still pressurized and still poses a safety risk in the cargo hold. TSA screeners will detect it on X-ray, and it will be confiscated. Attempting to conceal a prohibited item can result in fines.

Are dry shampoo and dry deodorant spray allowed in checked bags?

No. Both dry shampoo and dry deodorant spray come in aerosol containers and are prohibited in checked luggage. They are allowed in carry-on bags only if they are 3.4 ounces or smaller. If the product has a spray nozzle and comes from a pressurized can, it is an aerosol.

Can I pack sunscreen spray in my checked bag if it is not a full-size bottle?

No. Sunscreen spray is an aerosol and cannot go in checked luggage at any size. You may pack a 3.4-ounce container in your carry-on bag. For checked luggage, use sunscreen lotion or cream instead, which have no size restrictions.

What if my airline says it is okay to pack an aerosol in checked luggage?

No airline is permitted to allow aerosols in checked luggage. If an airline employee tells you this is acceptable, they are mistaken or misinformed. The rule is set by the FAA and TSA, not by individual airlines. Do not pack the aerosol based on this information—it will be confiscated at security.