TSA doesn’t allow pepper spray in carry-on bags. FAA rules allow one container of up to 4 fluid ounces (118 ml), with a safety mechanism, in a checked bag only, if your airline accepts it.
What TSA’s list says
| Item | Carry-on | Checked |
|---|---|---|
| Pepper spray | No | Yes |
| Self-defense sprays | No | Yes |
| Bear spray | No | No |
| Tear gas | No | No |
TSA’s pepper spray page reads: “One 4 fl. oz. (118 ml) container of mace or pepper spray is permitted in checked baggage provided it is equipped with a safety mechanism to prevent accidental discharge. Self-defense sprays containing more than 2 percent by mass of tear gas (CS or CN) are prohibited in checked baggage.” It adds: “We recommend checking with your airline as some may not allow this item in checked bags.”
The FAA rule
The FAA rule, 49 CFR 175.10, reads: “One self-defense spray (see § 171.8 of this subchapter), not exceeding 118 mL (4 fluid ounces) by volume, that incorporates a positive means to prevent accidental discharge may be carried in checked baggage only.” The FAA’s PackSafe chart puts it as one self defense spray per passenger, in checked baggage only.
Bear spray and tear gas
Bear spray isn’t allowed in carry-on or checked bags: the FAA’s chart lists bear spray and animal repellent as not allowed in either, and TSA’s list agrees. Self-defense sprays with more than 2% tear gas by mass are banned from both bags.
Who decides at the airport
TSA ends every page of its list with the same line: “The final decision rests with the TSA officer on whether an item is allowed through the checkpoint.” Your airline can also refuse a spray in a checked bag.
Flying from the UK
The UK doesn’t allow self defence or disabling sprays, such as mace or pepper spray, in hand luggage or in the hold (gov.uk, October 2026).