Aerosols on a plane: 3-1-1 in the cabin, FAA caps in the hold
Spray cans fly under two rulebooks: 3.4 oz in the cabin, 18 oz / 70 oz FAA caps in checked — and cooking spray is banned outright.
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What aerosol rules apply to carry-on versus checked luggage?
In carry-on baggage, toiletry aerosols (such as hairspray, dry shampoo, and spray deodorant) must strictly comply with the 3-1-1 liquids rule (max 3.4 oz / 100 ml container inside a quart bag). In checked luggage, personal care aerosols are permitted up to 18 oz (500 ml) per container with protective caps preventing accidental discharge.
What are the FAA aggregate volume caps for checked toiletry aerosols?
Under 49 CFR § 175.10(a)(1), the total aggregate quantity of all medicinal and toiletry hazardous materials (aerosols, perfumes, rubbing alcohol) in checked luggage cannot exceed 70 fluid ounces (2 liters or 2 kg) per passenger, with no individual container exceeding 18 fluid ounces (500 ml).
Which aerosol sprays are completely banned from passenger aircraft?
Flammable industrial aerosols (spray paint, WD-40, silicone lubricant, spray adhesive, engine starter fluid) and aerosol food cooking sprays (Pam) are strictly prohibited in both carry-on and checked luggage on all commercial flights.
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Frequently asked questions
Can I bring hairspray or spray deodorant in my checked bag?
Yes. Medicinal and toiletry aerosols (hairspray, body spray, deodorant, shaving cream) are permitted in checked baggage under 49 CFR § 175.10(a)(1) up to 18 oz (500 ml) per container and 70 oz (2 liters) total aggregate per passenger.
Why is Pam cooking spray banned on commercial aircraft?
Cooking oil aerosol sprays use flammable hydrocarbon propellants and are classified as hazardous materials without medicinal/toiletry exemptions, making them strictly banned from both cabin and checked baggage.