Domestically or international? Domestically, no and it probably depends on connecting flights for international. I flew United to New Zealand and didn't do any notice with United, but did do the major hoopla with NZ to bring in a firearm. For domestic flights, when I checked in at Houston (IAH) to go to Wyoming, the United folks did act as though it was the first gun they had ever seen. I was checking in at Terminal C and there were no TSA agents to check a gun. A United guy took my rifle case and key and walked it over to Terminal B to get it checked and then carried it back to me, waiting at the counter in Terminal C.