TSA item rule · verified 2026-09-05
Can you bring insulin on a plane?
TSA's official answer, checked against tsa.gov on 2026-09-05.
Carry-on bag limits apply
Allowed, with special instructions. TSA treats insulin as a medically necessary liquid, so it is exempt from the usual 3-1-1 liquids limit — tell the officer you have it and place it in a bin separately for X-ray screening.
Checked bag yes
Allowed in checked bags. Most people keep insulin in the cabin so it stays with them and reachable during the flight.
Declare the whole kit at the start of screening. TSA's medical guidance, which this page links to, says accessories such as freezer packs, pumps and syringes are screened alongside the medication, and that cooling packs may be presented frozen, partially frozen or melted.
Liquids, gels and aerosols in carry-on follow the TSA 3-1-1 rule. The final decision always rests with the TSA officer at the checkpoint.
Source: TSA — What Can I Bring? · checked 2026-09-05
Related: medication · inhalers · ice packs
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Common questions
Can you bring insulin in a carry-on?
Allowed, with special instructions. TSA treats insulin as a medically necessary liquid, so it is exempt from the usual 3-1-1 liquids limit — tell the officer you have it and place it in a bin separately for X-ray screening.
Can you bring insulin in checked baggage?
Allowed in checked bags. Most people keep insulin in the cabin so it stays with them and reachable during the flight.