How To Pack Frozen Foods
Whether you're packing frozen lobsters from Maine or farm-sourced ice cream from Vermont, it is possible to bring frozen foods on a flight without ending up with a puddle of lukewarm liquid. The solution: Pack your frozen items with dry ice. The Department of Transportation (DOT) permits dry ice onboard planes in quantities of 2.3 kilograms for checked luggage and 2 kilograms for carry-on luggage. The ice must be packed in a labeled, ventilated container that will allow carbon dioxide gas to pass through—don't put your dry ice in an airtight package.
Airlines have differing rules—and fees, unsurprisingly—regarding frozen foods. United, for example, issues a $100 service charge for checked baggage containing dry ice on flights within the U.S. or Canada and a $200 charge for flights in all other destinations. Contact your airline directly for information about transporting containers with dry ice on your flight.
Gel ice packs are an acceptable alternative to dry ice; but remember that liquids and gels aren't allowed on planes in quantities greater than 3.4 ounces.