Aerosol cans are prohibited in checked luggage on commercial flights

You cannot pack aerosol cans in your checked bag on any commercial airline in the United States or most international carriers. The Transportation Security Administration (TSA) and the International Air Transport Association (IATA) classify aerosols as dangerous goods because they are pressurized containers that can leak, rupture, or explode when exposed to pressure changes and temperature shifts in the cargo hold.

This rule applies to nearly all aerosol products: deodorant, hairspray, shaving cream, spray sunscreen, insect repellent, cooking spray, and air freshener. Even empty cans are prohibited because residual propellant remains inside. The only exceptions are very limited — a small number of toiletry aerosols may be allowed in carry-on bags under strict conditions, but checked luggage has no exceptions.

If you pack an aerosol in checked luggage and it is discovered during screening, the TSA will confiscate it. Your flight may be delayed while the bag is inspected, and you could face a fine of up to $75,000 in extreme cases, though fines are rare for first-time violations.

Key Takeaways

  • All aerosol cans, including deodorant and hairspray, are banned from checked luggage on commercial flights.
  • Empty aerosol cans are also prohibited because they retain pressurized propellant inside.
  • A very small number of toiletry aerosols may be packed in carry-on bags only, subject to TSA size and quantity limits.
  • Confiscation is certain if an aerosol is found in checked luggage, and your flight may be delayed during inspection.
  • You can purchase aerosol products at your destination or pack solid or liquid alternatives instead.

Why aerosols are dangerous in cargo holds

Cargo holds are unpressurized or only partially pressurized, and temperatures fluctuate significantly during flight. When air pressure drops, the gas inside an aerosol can expands. Heat from the sun on the tarmac or cold at high altitude can also cause the propellant to expand or contract. This pressure change can rupture the can, releasing flammable or toxic contents into the cargo hold where they cannot be controlled.

A single ruptured aerosol can damage other luggage, contaminate cargo, and create a fire hazard. If multiple cans rupture, the risk escalates quickly. Airlines and aviation authorities treat this risk seriously because a cargo fire at altitude is extremely difficult to extinguish and can threaten the entire aircraft.

What you can pack in carry-on bags instead

The TSA allows a limited number of toiletry aerosols in carry-on bags only. You may bring one 18 oz. container of self-defense spray (like pepper spray) and up to two 2.5 oz. aerosol cans of toiletries such as deodorant, hairspray, or shaving cream. These items must fit in a single quart-sized clear plastic bag along with other liquids and gels, and they count toward your liquid limit.

Check with your specific airline before packing, because some carriers have stricter rules than the TSA minimum. International flights often prohibit aerosols in carry-on bags entirely, even if the TSA allows them. If you are flying internationally, assume aerosols are not permitted unless your airline explicitly confirms otherwise.

Aerosol cans packed in carry-on bags must be placed in your personal item or roller bag — not in a separate toiletries bag — and screeners will inspect them during security screening.

Solid and liquid alternatives to pack instead

Solid deodorant sticks, bar soap, solid shampoo bars, and powder dry shampoo all work well and have no restrictions. These products take up less space than aerosols and are less likely to leak. Solid sunscreen sticks and solid insect repellent balms are also available at most drugstores and travel retailers.

Liquid versions of toiletries — shampoo, conditioner, lotion, sunscreen — can be packed in checked or carry-on bags as long as they follow the TSA liquid rules (3.4 oz. or 100 ml per container in carry-on bags). You can also purchase full-size bottles of these products at your destination, which often costs less than buying travel sizes before you leave.

What to do if you already packed an aerosol

If you have already packed an aerosol in your checked bag, remove it before you reach the airport. Do not attempt to bring it through security or check it at the ticket counter. If you discover it after checking your bag, inform a TSA officer or airline representative when ready — they may be able to retrieve it before your flight departs, though this is not may provide.

If an aerosol is discovered during baggage screening, the TSA will remove it and discard it. You will not be charged a fee for the confiscation itself, but your flight may be delayed while your bag is inspected for other prohibited items.

Rules for different types of aerosols

Toiletry aerosols (deodorant, hairspray, shaving cream, body spray) are prohibited in checked luggage but may be allowed in carry-on bags in very limited quantities. Flammable aerosols (spray paint, lighter fluid, cooking spray) are prohibited in both checked and carry-on bags. Medical aerosols (asthma inhalers, prescription sprays) are permitted in both checked and carry-on bags because they are considered medical devices, not dangerous goods, but you should carry them in your personal item for straightforward access.

Insect repellent aerosols fall into a gray area depending on their contents. DEET-based insect repellent is prohibited in checked luggage but may be allowed in carry-on bags in limited quantities on some airlines. Non-aerosol insect repellent (cream, lotion, or solid stick) has no restrictions. If you rely on a specific insect repellent for your destination, contact your airline before packing to confirm whether it is permitted.

Packing tips to avoid problems at the airport

Make a mental list of every aerosol product you own before you pack: deodorant, hairspray, dry shampoo, sunscreen spray, bug spray, air freshener, and cooking spray are the most commonly forgotten items. Check your toiletries bag, your bathroom cabinet, and any travel-size products you may have received as gifts.

If you are unsure whether a product is an aerosol, look at the can itself. Aerosol cans have a small button or nozzle on top and say "aerosol" or "pressurized" on the label. If you cannot find the label, do not pack it — the risk of confiscation is not worth the space it takes up.

Pack solid alternatives in your checked bag instead. They take up minimal space, weigh almost nothing, and you will have them available when ready when you arrive without needing to find a store.

Frequently Asked Questions

Can I pack an empty aerosol can in checked luggage?

No. Empty aerosol cans retain pressurized propellant inside and are treated the same as full cans. Even a can that appears empty is prohibited in checked luggage. Dispose of aerosol cans at home before you travel.

What happens if TSA finds an aerosol in my checked bag?

The TSA will confiscate and discard the aerosol. Your bag will be inspected, which may delay your flight. You will not receive the item back or a refund, but you typically will not face a fine unless you deliberately packed a prohibited item after being warned.

Can I pack aerosol sunscreen in my carry-on bag?

Aerosol sunscreen is prohibited in carry-on bags on most U.S. airlines. Pack a non-aerosol sunscreen lotion or cream instead, or purchase sunscreen at your destination. Some airlines may allow it in very limited quantities — contact your carrier before packing.

Are prescription inhalers allowed in checked luggage?

Yes. Prescription medical aerosols like asthma inhalers are permitted in both checked and carry-on bags because they are classified as medical devices. However, pack them in your carry-on bag so you have access to them during the flight if you need them.

Can I mail an aerosol to my destination instead?

Most aerosols cannot be shipped through the U.S. Postal Service, UPS, or FedEx because they are classified as hazardous materials. Check with your shipping carrier, but in most cases you will need to purchase the product at your destination or pack a non-aerosol alternative instead.