Several years ago I had to fly from Oakland back home to CO just to be there in time for opening morning. After I killed my bull, I bought four coolers at Wal-Mart, then processed my meat and put it in the coolers.

I put a couple of packages of dry ice on top, used duct tape to seal the edges, then used fiberglass re-inforced tape to make sure it did not come open. Airlines told me upfront that they could not insure it since the packages were not locked. I called my insurance company who said they would cover it. All worked out ok....can't remember how much extra they charged.