Can you bring a knife or Swiss Army knife on a plane? TSA rules
The short answer
No, not in a carry-on. TSA lists knives and Swiss Army knives as not allowed in carry-on bags and allowed in checked bags. Any sharp objects in checked bags should be sheathed or securely wrapped.
Carry-on
TSA lists knives as not allowed in carry-on bags. The same applies to Swiss Army knives. The exceptions are knives with rounded blades, blunt edges without serration or teeth such as butter knives, and plastic cutlery. For Swiss Army knives, TSA names the exceptions as plastic or round bladed butter knives.
Checked bags
TSA lists both as allowed in checked bags. TSA says any sharp objects in checked bags should be sheathed or securely wrapped to prevent injury to baggage handlers and inspectors.
Quick summary
- Knife in carry-on: no.
- Swiss Army knife in carry-on: no.
- Butter knife or plastic cutlery in carry-on: allowed.
- Any knife in checked bags: yes, sheathed or securely wrapped.
Before you leave the checkpoint
The final decision always rests with the TSA officer at the checkpoint.
Sources: TSA: Knives, TSA: Swiss Army Knife. Read 5 November 2026. Rules and fees change, so check the official page before you travel.
Frequently asked questions
Can I take a Swiss Army knife in my carry-on?
No. TSA lists Swiss Army knives as not allowed in carry-on bags, except plastic or round bladed butter knives.
Can I put a knife in checked baggage?
Yes. TSA says to sheathe or securely wrap sharp objects to prevent injury to baggage handlers and inspectors.
Are butter knives allowed in a carry-on?
Yes. TSA lists knives with rounded blades and blunt edges without serration, such as butter knives, as an exception.
Is plastic cutlery allowed?
Yes. TSA lists plastic cutlery as an exception to the carry-on knife ban.