Can You Bring Aerosol Toiletries on a Plane?

Direct Answer (2026 Official Rules)

Cabin: ⚠ LIMITED Hold: ✓ YES

Yes, with limits — you can bring aerosols in carry-on bags provided you follow security limits. Carry-on: ≤ 3.4 oz (100 ml) per can, in the liquids bag, cap on.

Verified against published 2026 TSA (United States) & CATSA (Canada) security screening databases.

On this page · 9 sections

⚖️ Why This Rule Exists: International 3-1-1 Liquid Security Rules & Container Geometry

Containers with a marked capacity of 100 ml (3.4 oz) or less that fit within a single clear, resealable 1-quart (1-liter) plastic bag are permitted through screening because small volumes can be rapidly inspected and present limited hazard potential.

Decision Threshold: 100 ml (3.4 oz) or smaller container + 1 clear quart bag per passenger.

Rules by security authority

United States — TSA

Cabin:

LIMITED

Yes, travel-size aerosol toiletries (≤ 3.4 oz / 100 ml) are fine in your quart-size bag. Keep the cap on to prevent accidental release.

Hold:

YES

Yes, under FAA limits: each aerosol ≤ 18 oz (500 ml), and a combined total of 70 oz (2 L) of toiletry/medicinal aerosols per person.

Rule conditions: Carry-on: ≤ 3.4 oz (100 ml) per can, in the liquids bag, cap onChecked: ≤ 18 oz (500 ml) per canChecked total: ≤ 70 oz (2 L) of aerosol/toiletry articles per personSpray paint is NOT a toiletry — banned in both bags

Flying internationally? Security follows the country you depart from — the authority above applies at your departure airport. Customs at arrival is separate.

🔍 Security Checkpoint & X-Ray Screening Advice

Place your clear 1-quart bag in the screening bin outside your luggage in 2D X-ray lanes. In 3D CT scanner lanes, keep it inside your bag unless instructed otherwise by the screening officer.

Learn more about scanner differences and traveler rights in our Airport Security Screening Guide →

⚠️ Common Traveler Mistake to Avoid

The Mistake: Carrying multiple quart bags per traveler or forgetting that pastes and gels (toothpaste, hair gel, lip gloss) count as liquids.

How to Avoid It: Consolidate all toiletries into one quart bag per traveler or transition to solid alternatives (shampoo bars, solid deodorant).

💧 3-1-1 liquids rule checker

One quart-size (≈1 L) bag per passenger; every container must be 3.4 oz (100 ml) or less.

Your container size (ml)

Fit is approximate — container shape decides real-world packing. Medically necessary liquids and infant food are exempt: declare them. Packing a whole bag? Plan it container by container →

How to Pack Aerosols (Hair Spray, Dry Shampoo) for a Flight

Everyday pump-free aerosols — hair spray, dry shampoo, shaving cream — are legal toiletries with real quantity math attached. Nozzle caps are mandatory in checked bags (a mid-flight discharge is what those rules exist to prevent), and the 2-liter checked total covers all your toiletry aerosols together.

Aerosols (Hair Spray, Dry Shampoo) on a plane — FAQs

Can you bring Aerosol Toiletries in a carry-on?

Yes, travel-size aerosol toiletries (≤ 3.4 oz / 100 ml) are fine in your quart-size bag. Keep the cap on to prevent accidental release.

Can you pack Aerosol Toiletries in checked luggage?

Yes, under FAA limits: each aerosol ≤ 18 oz (500 ml), and a combined total of 70 oz (2 L) of toiletry/medicinal aerosols per person.

Why are there rules for aerosol toiletries on a plane?

Can I bring dry shampoo on a plane?

Yes — aerosol dry shampoo follows the liquid rules: 3.4 oz or less in your liquids bag for carry-on, bigger cans in checked luggage within the FAA aerosol limits (≤ 18 oz each, 70 oz total).

Last verified: July 29, 2026

Verified against official sources. Rules change — for high-stakes items, confirm with your airline and the screening authority. Our verification method →