Aerosol cans are banned from both checked and carry-on luggage on commercial flights

You cannot pack aerosol cans in your checked bags or bring them through security in your carry-on. The Transportation Security Administration (TSA) and the Federal Aviation Administration (FAA) classify most aerosols as hazardous materials because they are pressurized containers that can rupture, leak, or explode when exposed to pressure changes and temperature shifts during flight.

This rule applies to nearly all consumer aerosols: deodorant, hairspray, shaving cream, spray sunscreen, insect repellent, and air freshener are all prohibited. The only exception is one 18 oz container of self-defense spray (like pepper spray) per passenger in checked luggage only, and it must have a safety mechanism to prevent accidental discharge.

If you arrive at the airport with aerosols in your luggage, security will confiscate them. You cannot retrieve them later or ask to mail them home—they are destroyed. The best approach is to leave aerosols at home and purchase travel-size or solid alternatives at your destination, or pack only non-aerosol versions of the products you need.

Key Takeaways

  • Aerosol cans of any size are forbidden in both checked and carry-on bags on all commercial flights in the United States.
  • Common aerosols like deodorant, hairspray, and spray sunscreen will be confiscated at security and cannot be returned to you.
  • The only aerosol exception is one 18 oz container of self-defense spray per passenger, which must go in checked luggage with a safety lock.
  • Solid stick deodorant, powder, cream sunscreen, and solid shaving soap are allowed in both checked and carry-on bags as aerosol-free alternatives.
  • If you need these products at your destination, buy them after you arrive or pack solid versions instead of aerosols.

Why aerosols are prohibited on planes

Aerosol cans rely on pressure to spray their contents. When a plane climbs to cruising altitude, the cabin pressure drops significantly, and the external air pressure outside the plane is much lower than inside the can. This pressure difference can cause the can to rupture or leak. If the can ruptures in the cargo hold, the pressurized contents can ignite or cause a fire, especially if the aerosol contains flammable ingredients like those in hairspray or spray paint.

Temperature also plays a role. Cargo holds are not climate-controlled on all flights, and extreme cold or heat can increase pressure inside the can or weaken its metal walls. A combination of pressure changes and temperature swings creates a genuine safety risk that airlines and the FAA take seriously.

What counts as an aerosol

An aerosol is any product dispensed from a pressurized metal or plastic container using a propellant gas. This includes obvious items like spray deodorant and hairspray, but also less obvious ones: spray sunscreen, spray bug repellent, spray starch, spray paint, cooking spray, whipped cream dispensers, and air freshener. Even partially used cans are prohibited.

Products that look similar but are not aerosols are allowed. Solid stick deodorant, cream or lotion sunscreen, solid shaving soap, and pump-bottle insect repellent all pass through security without issue. Roll-on deodorant is also permitted. If you are unsure whether a product is an aerosol, check the label—it will say "pressurized container" or show a spray nozzle symbol.

The self-defense spray exception

One self-defense spray (pepper spray or similar) per passenger is the only aerosol allowed on a plane, and only under strict conditions. It must be in checked luggage only—never in carry-on. The container must be equipped with a safety mechanism to prevent accidental discharge, and it cannot exceed 18 fluid ounces (about 500 milliliters). You must declare it to the airline when you check your bag.

Not all airlines allow this exception, so contact your airline before you pack. Some carriers prohibit self-defense spray entirely, even in checked bags. If you are traveling with self-defense spray, arrive early and inform the check-in agent so they can properly document and stow it.

Solid and liquid alternatives that are allowed

You can pack solid or cream versions of almost any product you would normally buy as an aerosol. Solid stick deodorant works just as well as spray and takes up less space. Cream or lotion sunscreen is allowed in carry-on bags up to 3.4 ounces (100 milliliters) and in unlimited amounts in checked luggage. Solid shaving soap or cream shaving soap can replace aerosol shaving cream. Powder insect repellent or a pump-bottle spray repellent are both allowed.

For hairspray, solid pomade or wax provides similar hold without the aerosol. For air freshener, solid or gel air fresheners are permitted. Many travel retailers sell solid versions of common products specifically for travelers, and they are often cheaper than buying multiple small containers. Buying these items at your destination is also an option if you do not want to pack them.

What happens if you try to bring an aerosol through security

If you pack an aerosol in your carry-on, TSA officers will find it during the X-ray screening at the security checkpoint. They will confiscate it when ready. You cannot go back to the ticket counter and check it instead—once it is confiscated, it is gone. You will not be refunded, and you cannot retrieve it later.

If an aerosol is in your checked bag, it will be discovered during baggage screening. The airline may confiscate it, delay your flight while they remove it, or refuse to load your bag onto the plane. In rare cases, if the aerosol leaks or ruptures, your entire bag may be removed from the flight. The best practice is to double-check your luggage before you leave home and remove any pressurized containers.

How to prepare your luggage for air travel

Before you pack, make a list of personal care items you use daily and find non-aerosol versions. Solid deodorant, cream sunscreen, and solid shaving soap are straightforward swaps. For items you cannot replace, plan to buy them at your destination—most hotels have small bottles of shampoo and lotion, and drugstores near airports sell travel-size products.

If you are packing checked luggage, do a final check before you seal it. Look for any spray bottles, pressurized containers, or cans. Check the labels of products you are unsure about. If you are traveling with someone else, remind them of the aerosol ban so they do not accidentally pack prohibited items in a shared bag. Arriving at the airport with confiscated items wastes time and money, so a few minutes of preparation at home saves frustration later.

Frequently Asked Questions

Can I pack a travel-size aerosol deodorant if it is under 3 ounces?

No. Size does not matter—all aerosol cans are prohibited, whether they are full-size or travel-size. The ban is based on the pressurized container itself, not the amount of product inside. A 1 ounce aerosol is just as forbidden as a 5 ounce one.

What if I forgot an aerosol is in my checked bag and it gets confiscated?

Once confiscated, you cannot retrieve it or get a refund. The item is destroyed as a safety precaution. Contact the airline after your trip if you want to report the loss, but they are not required to compensate you since the ban is clearly posted. The best remedy is prevention—check your bag before you leave home.

Are dry shampoo sprays allowed?

No. Dry shampoo in aerosol form is pressurized and prohibited in both checked and carry-on bags. Dry shampoo powder, sold in a shaker bottle or compact, is allowed. Some brands sell dry shampoo in both formats, so look for the powder version when you shop.

Can I pack sunscreen in my carry-on?

Yes, if it is cream, lotion, or gel sunscreen in a container of 3.4 ounces (100 milliliters) or smaller. Spray sunscreen is prohibited. Cream and lotion sunscreen work just as well and are easier to pack anyway since they do not leak as easily as sprays.

Do international flights have different rules about aerosols?

International flights follow similar hazardous materials rules set by the International Air Transport Association (IATA). Most countries ban aerosols from passenger luggage. If you are flying internationally, assume the same restrictions explore and contact your airline to confirm their specific policy before you pack.