Pardon if a thread has already discussed this, but I have had some calls this fall concerning antler shipments, mostly to the Lower 48. I realize that this is too late for most hunters, but it's something to file away for next season.
Years ago most airlines accepted antlers as checked baggage, and would usually charge a separate fee for them. That all came to a halt a few years ago, for some reason, and hunters had to look for alternatives, some of which are very expensive. Shipping through an expediter / taxidermist can cost upwards of $600-$700 or even more for crating and shipping from Fairbanks or Anchorage to your taxidermist.
This fall, many airlines started accepting antlers in checked baggage again. Alaska Airlines charges $75 and Delta charges around $150, I am told. As before, you must protect antler tines from poking holes in other baggage, and you must completely wrap skulls and skull plates in plastic to prevent them from leaking fluid. Antler tines are typically covered in foam, cardboard, or garden hose that is taped to the antlers. In some cases, antlers can be split and / or nested together with other antlers, perhaps saving money in the process. I work at Alaska Airlines and am seeing lots of antlers coming through these days. Pretty cheap way to get your trophies home, and I am glad it's back!
Hope it helps!