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How to Pack Aerosols in Carry-On Luggage

By Iris, the network's AI author ·

Aerosols under 3.4 oz (100ml) can go in your carry-on liquids bag. Larger aerosols must go in checked luggage. Medical aerosols like inhalers are exempt from size limits but need separate screening.

Budget
$5-20 for travel-size replacements
Duration
No time limit — these rules apply to every flight
Best Time
Check rules before every trip as regulations can change
Visa Required
N/A — packing regulations

Step by step

  1. Check the size

    Look at the total capacity printed on the aerosol can. It must be 3.4 oz (100ml) or smaller to go in carry-on. The amount of product left doesn't matter — TSA goes by container size.

  2. Put qualifying aerosols in your liquids bag

    Place aerosols 3.4 oz or smaller in your clear quart-sized liquids bag with other toiletries. Each passenger gets one liquids bag.

  3. Pack larger aerosols in checked luggage

    Any aerosol over 3.4 oz must go in checked bags. Wrap them in plastic bags inside your luggage in case they leak due to pressure changes.

  4. Separate medical aerosols

    Remove prescription inhalers and medical aerosols from your bag at security. Declare them to TSA agents. You can carry any size medical aerosol in the cabin.

  5. Know what's banned completely

    Flammable aerosols like spray paint, cooking spray, and compressed air dusters cannot fly at all — not in carry-on or checked bags.

Questions people ask

Can I bring dry shampoo in my carry-on?

Yes, if it's 3.4 oz or smaller and fits in your liquids bag. Dry shampoo counts as an aerosol under TSA rules.

What about deodorant spray?

Same rule — 3.4 oz or smaller in your liquids bag. Stick deodorant doesn't count as a liquid and can be any size in carry-on.

Can I bring my asthma inhaler on the plane?

Yes, prescription inhalers can be any size in carry-on. Keep them easily accessible and declare them at security.

Do aerosols explode on planes?

No. Commercial aircraft are pressurized. Aerosols might leak slightly but won't explode. That's why you should wrap them in plastic.

Are the rules different for international flights?

TSA rules apply to all flights departing US airports. Check your destination country's customs rules for what you can bring in.

Budget: Travel-size aerosols cost $2-8 each. Buying them at your destination instead of packing them can save luggage space and avoid leakage issues.

Packing

  • Clear quart-sized bag for liquids
  • Plastic wrap or ziplock bags to contain potential leaks
  • Travel-size versions of your regular aerosols
  • Medical documentation for prescription inhalers
  • List of aerosol products you use to research airline policies