5 Rules for Checking a Cooler as Luggage

Coolers count as checked bags if they meet size limits Most airlines allow hard-sided coolers up to 62 linear inches (length + width + height). Soft coolers are usually fine as carry-ons if they fit under the seat, but hard coolers provide better insulation for frozen food.

Dry ice is strictly limited You can only take about 5.5 pounds of dry ice per passenger, and it must be properly marked and ventilated. Most travelers are better off using frozen gel packs or regular ice in sealed bags.

Regular ice requires extra preparation Regular ice will melt and leak, so double-bag your food and line the cooler with absorbent material. Pack dense frozen items like meat and stews, and avoid liquids that could spill.

TSA will inspect the cooler If your food is frozen solid, it will pass inspection. Partially thawed or suspicious-looking contents may lead to the cooler being opened. Use a TSA-approved lock or zip ties that can be cut.

Don’t pack old or questionable food A cooler works for transporting frozen food, but don’t fill it with fish you caught weeks ago. Spoiled or smelly items will not be welcomed by airline staff or other passengers.