You can bring sunscreen on a plane, but the size depends on whether it’s in your carry‑on or checked bag.

Quick Scoop

Carry‑on bag (in the cabin)

  • Sunscreen counts as a liquid/gel/aerosol , so it must follow the standard “3‑1‑1” liquids rule.
  • Each container must be 3.4 oz (100 ml) or less.
  • All your liquids (including sunscreen) have to fit into one clear, quart‑size zip‑top bag.
  • The limit is based on container size , not how full it is (a half‑empty 6 oz bottle is still too big for carry‑on).

Checked bag (under the plane)

  • You can pack larger bottles of sunscreen in checked luggage.
  • Many airline/TSA guidance pages note that individual liquid/aerosol toiletry containers in checked bags can be much bigger, commonly up to around 17 fl oz (500 ml) per container for sunscreen‑type products.
  • Check your specific airline and country’s security rules if you’re flying outside the US, as exact limits can vary.

Simple rule to remember

  • Carry‑on: Travel‑size only → 3.4 oz / 100 ml max per bottle, all in one quart bag.
  • Checked bag: Full‑size is fine → aim for ≤ 17 oz / 500 ml per container and pack upright to avoid leaks.

If you’re unsure, buy a couple of 3.4 oz travel bottles, decant your favorite sunscreen, and keep the big bottle in your checked suitcase.

Information gathered from public forums or data available on the internet and portrayed here.