Your post is a little confusing. Are you looking for coolers to transport from the field, plane home, or both? If just transporting from the field the Sportsman's Warehouse in Anchorage had insulated boxes that fold up and are relatively light and flat for around $16 each. Sportsman's also had regular 50 lb fish boxes with foam insulation for $16 each. A lot cheaper than the price of coolers!
I used Alaska Airlines and used 50 lb insulated fish boxes for hauling my meat home. It was $65/box to ship as luggage. If you went with a large cooler that weighs over 50 lbs it would be $150/cooler. I would definitely bone the meat to save on bulk plus weight!