From Delta's site:
Dry-ice packages in amounts of 5.5 lbs. (2.5 kg) or less is allowed when used to cool non-hazardous perishables in carry-on or checked baggage. The package must:
- meet carry-on baggage restrictions
- allow the release of carbon dioxide
- state on the package, "Dry Ice" or "Carbon Dioxide Solid"
- specify the net weight of the dry-ice material on the packaging
- include the contents being cooled, in writing, on the packaging
If possible, instead of dry ice, we encourage the use of gel packs or similar products to keep frozen perishable items fresh. For more information, you can download the
Guidelines to Transport Dry Ice.
Wet-ice shipments are not allowed as carry-on baggage, checked baggage or cargo on Delta or Delta Connection® flights.
---------- Post added December 31st, 2013 at 11:32 PM ----------
And from DryIceNetwork.com (Gotta say I'm surprised, as I thought mstevens was on the right track).
[h=3]Checked Baggage[/h]The TSA has some guidelines/restrictions for how the dry ice must be stored.
- All dry ice must be placed in packaging that allows the release of carbon dioxide gas. As dry ice sublimates, it will turn in to carbon dioxide gas. If the carbon dioxide gas cannot escape the packaging, then the package may explode.
- You are limited to 5 pounds of dry ice per checked baggage.
- Every package of dry ice must be marked “CARBON DIOXIDE SOLID” or “DRY ICE”.
- Every package of dry ice must also be marked with the net weight of the dry ice or an indication that the dry ice is 5 pounds or less.
[h=3]Carry-On Baggage[/h]Dry ice in carry-on baggage is regulated just a little bit differently than checked baggage. Here is the list of requirements for carry-ons:
- Dry ice must be placed in packaging that is allowed to release carbon dioxide. Again, if the dry ice is in an air tight container, it could explode. Having things explode on a plane is probably not a good idea.
- You are limited to 4.4 pounds of dry ice per carry-on.
- Every package of dry ice must be marked “CARBON DIOXIDE SOLID” or “DRY ICE”.
- Every package of dry ice must also be marked with the net weight of the dry ice or an indication that the dry ice is 4.4 pounds or less.
[h=3]Important[/h]This article was written in January 2011. It is always good practice to verify the rules of bringing dry ice in your luggage with the TSA, FAA, and your individual airline. You should plan on verifying the rules for bringing dry ice in your luggage at least 1 or 2 weeks in advance of your trip.
