Can You Bring Aerosol on a Plane?

Are aerosols allowed through airport security?

Yes, most personal-care aerosols are allowed, but they follow the same rules as liquids. Under the TSA liquids rule, aerosols in your carry-on must be in containers of 3.4 ounces (100 milliliters) or less and fit inside one quart-size bag with your other liquids and gels. This covers everyday items like deodorant, hairspray, dry shampoo, spray sunscreen, and shaving cream. Solid or powder versions, such as stick deodorant or powder sunscreen, do not count as liquids and have no size limit. Aerosols over 3.4 ounces are not allowed through the checkpoint; pack those in checked luggage instead. TSA officers make the final call, so anything that alarms or leaks may be pulled.

Which aerosols can you pack in checked luggage?

Larger toiletry and personal-care aerosols belong in checked bags. The FAA allows medicinal and toiletry aerosols in checked luggage with limits: each container can hold up to 18 ounces (500 milliliters), and the total across all containers cannot exceed 70 ounces (about 2 kilograms). The release cap must be protected by a cap or another suitable means to prevent accidental discharge. This covers full-size deodorant, hairspray, shaving cream, and sunscreen. These limits apply to personal-care and medicinal aerosols only; household and industrial sprays are treated differently and are usually prohibited.

Which aerosols are banned entirely?

Flammable, toxic, and hazardous aerosols are prohibited in both carry-on and checked baggage. This includes spray paint, most bug sprays with flammable propellant, cooking sprays, and aerosol cleaners or lubricants like WD-40. These count as hazardous materials, so the toiletry exemption does not apply. Self-defense sprays such as pepper spray and mace are also restricted; they are banned from carry-on, and airlines allow only one small container, generally under 4 ounces with a safety cap, in checked baggage. When in doubt, check the label: if it shows a flammable symbol, leave it home.

How should you pack aerosols for a flight?

Sort your aerosols before you pack. Put travel-size toiletry aerosols of 3.4 ounces or less in your quart bag with your other liquids for easy screening. Move full-size grooming aerosols to your checked bag, keeping each under 18 ounces with the cap on. Leave any flammable, cleaning, or self-defense aerosol at home unless your airline specifically permits a small self-defense container in checked luggage. Medically necessary aerosols, like an asthma inhaler, are not restricted; you can carry those in larger quantities in your carry-on and simply declare them for separate screening.