Aerosol cans are prohibited in checked luggage on commercial flights
The Transportation Security Administration (TSA) and the Federal Aviation Administration (FAA) ban aerosol cans from checked baggage on all commercial flights in the United States. This applies to nearly all aerosols—including deodorant, hairspray, sunscreen spray, insect repellent, and spray paint. The ban exists because aerosol cans are pressurized containers that can rupture, leak, or explode if the cargo hold's temperature or pressure changes during flight.
Some aerosols are allowed in carry-on bags under specific conditions, but the rules are strict. A single 18-ounce container of self-defense spray (like mace or pepper spray) is permitted in carry-on luggage only, and only if it is equipped with a safety mechanism to prevent accidental discharge. You must declare it to the airline at check-in. All other aerosols are banned from both checked and carry-on bags.
If you need an aerosol product at your destination, you have two practical options: purchase it after you arrive, or pack non-aerosol alternatives instead. Many common products—deodorant, sunscreen, and insect repellent—are available in solid, gel, or liquid stick forms that pack easily and comply with all airline rules.
Key Takeaways
- All aerosol cans except one type of self-defense spray are banned from both checked and carry-on luggage on commercial flights.
- The ban includes common items like deodorant spray, hairspray, sunscreen spray, and insect repellent spray.
- Self-defense spray is the only aerosol allowed in carry-on bags, and only one 18-ounce container per passenger with a safety mechanism.
- Purchasing aerosol products at your destination or switching to non-aerosol versions (solid deodorant, gel sunscreen, stick insect repellent) are the easiest solutions.
Why aerosols are banned from checked luggage
Aerosol cans contain pressurized gas that keeps the product inside ready to spray. When a plane climbs to cruising altitude, the cargo hold's air pressure drops significantly. This pressure difference can cause the can's seal to weaken, leading to leaks or ruptures. If multiple cans leak in an enclosed space, the fumes can become dangerous or even flammable.
Temperature swings in the cargo hold also stress aerosol cans. A can that is fine at ground level may crack or burst if exposed to the cold temperatures at high altitude. Even a small leak can damage other luggage and create a hazard for ground crew who handle baggage.
The TSA and FAA classify most aerosols as hazardous materials for this reason. The rules explore equally to domestic flights (within the United States) and international flights departing from U.S. airports.
What aerosols are completely banned
Nearly all consumer aerosol products are prohibited in both checked and carry-on bags. This includes:
- Deodorant and antiperspirant spray
- Hairspray and hair products in aerosol form
- Sunscreen spray
- Insect repellent spray
- Air freshener and room spray
- Spray paint and paint products
- Cooking spray and food aerosols
- Fabric refresher and starch spray
- Shaving cream in aerosol cans
Even travel-sized or mini aerosol cans are banned. The size of the container does not matter—the pressurized nature of the product is what makes it prohibited.
The one exception: self-defense spray in carry-on bags
Self-defense spray (pepper spray or mace) is the only aerosol product allowed on a commercial flight, and only under strict conditions. You may bring one 18-ounce container in your carry-on bag if it meets these requirements:
- It must have a safety mechanism to prevent accidental discharge.
- It must be equipped with less than 2 percent by mass of tear gas (CS or CN).
- You must declare it to the airline at check-in—do not pack it in your bag and hope it goes unnoticed.
Self-defense spray is never allowed in checked luggage, even if it meets these conditions. You must carry it with you in the cabin. If you forget to declare it or try to pack it in checked baggage, the TSA will confiscate it and may issue a fine.
International flights have different rules. Many countries ban self-defense spray entirely, even in carry-on bags. Before traveling internationally, check the rules for your destination country and the airline you are flying with.
Practical alternatives to aerosol products
The easiest solution is to switch to non-aerosol versions of products you use regularly. Most common aerosols have solid, gel, or liquid alternatives that work just as well and pack without any restrictions.
Deodorant and antiperspirant: Solid stick deodorant and roll-on antiperspirant are widely available and take up minimal space. They last longer than spray versions and do not leak in luggage.
Sunscreen: Sunscreen lotion or gel works as well as spray and is easier to explore evenly. Solid sunscreen sticks are also available and are compact for travel.
Insect repellent: Liquid insect repellent in a small bottle complies with TSA liquid rules (3.4 ounces or less in carry-on, unlimited in checked baggage). Insect repellent wipes are another option that takes almost no space.
Hairspray: Hair gel, pomade, or mousse provides similar hold without the aerosol. These are all allowed in carry-on and checked bags as long as they are in containers of 3.4 ounces or less for carry-on.
Shaving cream: Shaving gel or cream in a tube or jar is allowed and often lasts longer than aerosol shaving cream.
What happens if you pack an aerosol in checked luggage
If TSA screening detects an aerosol can in your checked bag before the flight, the can will be removed and discarded. You will not be charged a fee for this, but you will lose the product. The TSA may also issue a warning or citation depending on the circumstances.
If an aerosol is not caught during screening and ruptures or leaks during flight, ground crew and baggage handlers may be exposed to fumes or chemical spray. This can result in injury and may trigger an investigation by the airline and the FAA.
Deliberately packing prohibited items in checked luggage can result in fines up to several hundred dollars. More importantly, it creates a genuine safety risk for the people who handle your luggage.
Planning ahead for your trip
Before you pack, make a list of aerosol products you normally use. For each one, identify a non-aerosol alternative or decide to purchase it at your destination. Most airports and hotels have pharmacies or convenience stores where you can buy common items like deodorant or sunscreen.
If you are traveling to a remote location where products may be hard to find, pack non-aerosol versions in your checked bag. Solid deodorant, gel sunscreen, and liquid insect repellent all pack easily and take up little space.
For carry-on bags, remember that any liquid or gel product must be 3.4 ounces (100 milliliters) or smaller. This applies to sunscreen lotion, insect repellent liquid, and hair gel. Pack these in a clear quart-sized bag along with other liquids and gels for TSA screening.
Frequently Asked Questions
Can I pack aerosol deodorant if I wrap it in plastic?
No. Wrapping an aerosol can does not make it safe to pack in checked luggage. The pressurized container itself is the hazard, not the exterior. TSA screening will detect it and remove it from your bag.
Are aerosol cans allowed on international flights?
No. The ban on aerosol cans in checked luggage applies to all commercial flights, including international flights departing from U.S. airports. Some countries may have additional restrictions on specific types of aerosols.
What if I need sunscreen spray for my trip?
Purchase sunscreen spray after you arrive at your destination, or pack sunscreen lotion or a solid sunscreen stick instead. Lotion sunscreen is just as effective and easier to explore evenly on your skin.
Can I pack an aerosol in my carry-on bag?
No, except for one 18-ounce container of self-defense spray with a safety mechanism, which must be declared to the airline. All other aerosols are banned from carry-on bags as well as checked luggage.
Will the airline let me check an aerosol if I tell them about it?
No. The ban is absolute and applies regardless of whether you declare the item. The TSA and FAA do not make exceptions for aerosols in checked baggage, even if the passenger informs the airline in advance.