Can You Bring Pepper Spray on a Plane? TSA and FAA Rules

Where these numbers come from

Pepper spray sits in a narrow legal lane. The FAA's rule allows one self-defense spray of up to 118 ml (4 fluid ounces) per passenger, in checked baggage only. It is banned from carry-on and from the cabin. That means the can has to be packed before you reach the airport and cannot be carried through the checkpoint in a coat or purse.

The spray also has to meet a content and design test. It may not contain more than 2 percent by mass of CS or CN tear gas, and it needs a positive way to prevent accidental discharge. A recessed button alone is not enough under the FAA's wording. A flip cap, a twist-lock or a safety clip that blocks the trigger meets the standard. Check the label before you pack it.

Airlines can be stricter than the federal rule. Some carriers prohibit pepper spray in every bag, and a flight that connects through another country brings that country's law into play. The FAA says self-defense sprays are barred from both carry-on and checked bags on international flights. If your trip crosses a border, leave it at home and buy one at your destination if local law allows.

Work through an example. You pack a 1-ounce keychain spray and a 2-ounce spare in the same checked bag. Only one container is permitted per passenger, so the spare is out. Both are well under 4 fl oz, so size is not the problem, quantity is. You keep the keychain unit, cap the trigger with its safety, seal it in a zip bag and tuck it in a toiletry pouch so it cannot press against a hard object.

State and local law is a second question. Some states limit canister size, buyer age or where you can buy, and some buildings ban it outright, including courthouses and federal facilities. Check the laws of your destination before you plan to carry it there. This is general information, not legal advice.

Bear spray is a different product with a much larger can; see the bear spray page. Other aerosol rules are on the aerosols page, and the TSA item finder can check the rest of your bag.

Sources

• TSA pepper spray (seen in search; tsa.gov blocked automated fetch)
• FAA PackSafe sprays and repellents
• eCFR 49 CFR 175.10 (hazmat exceptions for passengers)
• FAA PackSafe printable chart (updated 11/14/25)
• FedLaws: pepper spray on a plane
• POM: flying with pepper spray

Figures checked on September 30, 2026.

This page is general information, not legal, insurance or travel-agent advice. Fees, rules and limits change, so confirm the figures with the official sources listed above before you book or travel.