Short answerYes, up to 5.5 lb (2.5 kg) per passenger, to keep perishables cold, and only with your airline's approval.
The FAA rules
- Limit: 2.5 kg (5.5 lb) per package and per passenger.
- It must be used to pack perishables.
- Airline approval is required. Check with your airline before you pack.
- The package must not be airtight and must let carbon dioxide escape.
- Checked bags: mark the package "dry ice" or "carbon dioxide, solid" with the net weight (or 2.5 kg or less).
Before you go
Call your airline: some have their own limits on top of the FAA rule.
Sources (checked October 27, 2026)
General guidance, not professional safety advice. Follow your supplier’s and carrier’s instructions.