Can you take aerosols on a plane? The complete 2026 guide

Few things derail a smooth trip through airport security like an aerosol can you forgot was in your bag. One minute you're breezing toward your gate, the next you're watching a security officer hold up your dry shampoo and ask if you really need it. If you've ever found yourself googling "can you pack aerosols on a plane" the night before a flight, you're not alone — and the good news is, the answer is almost always yes, with a few rules to keep in mind.

Here's everything you need to know about flying with aerosols, deodorant, and other spray-on essentials, so you can pack with confidence and skip the last-minute panic.

Can you pack aerosols on a plane?

Yes — aerosols are allowed both in carry-on bags and in checked luggage, but the rules are different depending on where you pack them.

In your carry-on (hand luggage): Aerosols fall under the same liquids rule as your shampoo and toothpaste — commonly known as the 3-1-1 rule (or the 100 ml rule, as it's more commonly known outside the US). Each container must hold 100 ml (3.4 oz) or less, and all your liquid, gel, cream, and aerosol containers together must fit into a single 1-litre, clear, resealable bag. One bag per passenger.

In checked luggage: The size limit is far more generous. Aerosols in checked bags can generally be packed in containers up to 500 ml (18 oz) each, with a total limit of 2 kg (70 oz) of aerosols per passenger. This makes checked baggage the better option if you're traveling with full-size haircare or skincare aerosols.

The one big exception that applies everywhere: flammable aerosols are banned from both carry-on and checked bags. This isn't about size — it's about what's inside the can. Items like spray paint, aerosol cooking spray, WD-40, and aerosol laundry starch are prohibited entirely because of how they could behave in a fire, however unlikely that scenario is. If you spot the word "flammable" or "extremely flammable" on the label, leave it at home and buy a replacement at your destination instead.

Can you take deodorant on a plane?

Absolutely — deodorant is one of the most-asked-about toiletries, and it's allowed in just about every form:

Stick or roll-on deodorant: No restrictions at all. Pack as many as you like, in any size, in either your carry-on or checked bag.
Spray or aerosol deodorant: Treated like any other aerosol. In carry-on, it must be 100 ml (3.4 oz) or smaller and go in your liquids bag. In checked luggage, larger cans are fine as long as they're non-flammable and within the overall aerosol allowance.
Gel deodorant: Counts as a liquid under the 100 ml rule, so the same carry-on limit applies.

If you're tight on space in your liquids bag, switching to a solid or stick deodorant for the trip is the easiest way to free up room — and it sidesteps the size limit entirely.

Can you take aerosols in hand luggage?

Yes, with the caveat that they have to play by the same rules as every other liquid in your bag. To get an aerosol through security in your hand luggage:

Check the size. The container itself must be 100 ml (3.4 oz) or less — even if it's only half full, a 175 ml can won't pass, regardless of how much product is left inside.
Bag it correctly. It needs to go in your one 1-litre, clear, resealable bag along with your other liquids, gels, and pastes.
Check what's inside. Non-flammable aerosols (hairspray, dry shampoo, sunscreen spray, most deodorants) are fine. Flammable ones are not, regardless of size.
Protect the nozzle. Many airlines and security agencies ask that the spray trigger be capped or otherwise protected against accidental discharge in your bag.

Common carry-on-friendly aerosols include travel-size hairspray, dry shampoo, sunscreen, and deodorant. If you regularly travel with full-size versions of these, it's often simpler to pack them in your checked bag instead and avoid the size limit altogether.

Aerosols not allowed on a plane: What to leave at home

A few categories are worth double-checking before you pack, since they're either banned outright or restricted to checked baggage only:

Spray paint — prohibited in carry-on and checked luggage due to flammability.
Aerosol cooking spray — banned for the same reason.
WD-40 and similar lubricant sprays — not permitted on board at all.
Bug spray (insecticide aerosols) — generally allowed in checked baggage only, and never in carry-on, regardless of can size.
Self-defense sprays (pepper spray, mace) — heavily restricted or banned outright by most airlines; check with your carrier before assuming it's allowed.

When in doubt, a quick glance at the can's label will usually tell you what you need to know. Words like "flammable," "extremely flammable," or a flame symbol are the clearest red flags.

Quick-Reference Packing Tips

Read the label first. Flammability is the deciding factor for whether an aerosol is allowed at all — size limits only matter for non-flammable products.
Keep your liquids bag accessible. Pulling it out quickly at security keeps the line moving and reduces the chance of a manual bag search.
When traveling internationally, be aware that rules can vary slightly by country, though most follow a version of the same 100 ml carry-on limit. If you're connecting through multiple countries, the strictest rule along your route applies.
Pack checked aerosols snugly. Surround cans with clothing rather than placing heavy items directly on top, and avoid leaving checked bags in hot car trunks before a flight, since heat increases internal can pressure.
Lost track of a liquid limit mid-trip? If a flight delay or itinerary change means an unplanned extra security screening, it's worth re-checking your liquids bag before you head back through the checkpoint — products can shift, and a forgotten full-size bottle is an easy way to lose a favorite product at the gate.

Frequently Asked Questions

Can you pack aerosols on a plane? Yes. Non-flammable aerosols are allowed in both carry-on and checked luggage. In carry-on, each container must be 100 ml (3.4 oz) or smaller and fit in your liquids bag. In checked baggage, containers can be up to 500 ml (18 oz), with a 2 kg (70 oz) total limit. Flammable aerosols are banned from both.

Can you take deodorant on a plane? Yes. Stick and roll-on deodorant have no restrictions. Spray and gel deodorant count as liquids, so they're limited to 100 ml (3.4 oz) containers in carry-on, though larger sizes are fine in checked bags.

Can you take aerosols in hand luggage? Yes, as long as each can is 100 ml (3.4 oz) or smaller and travels in your one 1-litre liquids bag. The aerosol also needs to be non-flammable — flammable products like spray paint or cooking spray aren't allowed in hand luggage at any size.

Is hairspray allowed on a plane? Yes, hairspray is treated like any other aerosol. A travel-size can (100 ml or less) can go in your carry-on liquids bag; full-size cans are best packed in checked luggage.

What aerosols are not allowed on a plane at all? Flammable aerosols such as spray paint, aerosol cooking spray, WD-40, and aerosol laundry starch are prohibited in both carry-on and checked baggage, regardless of can size.

The Bottom Line

For nearly every traveler, the answer to "can I bring my aerosols on the plane" is yes. Pack non-flammable aerosols under 100 ml in your carry-on liquids bag, save larger cans for checked luggage, and skip flammable products like spray paint and cooking spray entirely. Deodorant, in any form, is one of the easiest toiletries to travel with — just remember that spray and gel versions count toward your liquid limit, while sticks and roll-ons don't.

A little label-reading before you pack goes a long way toward a smooth trip through security — and one less thing standing between you and your gate.