Carol, I am more concerned about going through TSA than I am with the airline. I am flying with American Airlines and their "rules" seem pretty straightforward and simple (carry on only). I am transporting the remains in the vinyl/cardboard box in which the funeral home delivered them to me. Inside, the ashes are in a thick plastic bag. I cannot see for any reason why TSA would have any problem x-raying the boxes. I plan to arrive at CLT a bit earlier than normal just in case.