garand4life:
You need to find three websites:
1. TSA - They will tell you everything you need to know;
2. The airline you are flying on - They will tell you their expectations (rules);
3. Your airport.
Basics are you need a hard sided case with padlock; the guns must be unloaded - I leave the actions open; ammunition must be in a factory box and not in the gun case; TSA will give you an ammunition weight and count - I believe it is ten pounds or 200 rounds, which ever is least, but our airport maxes you at 100 rounds, so out to the pick up I went to stuff some under the seat; number of guns you can take with you; and they want you at the airport to check in two hours early. Our airport also has asked, but not required, that the gun case not look like a gun case, so I put my Kalispel in a duffel bag. When I just take handguns I put the case in my suitcase, and the ammunition is in the suitcase as well.
It is really easy! Just be open and honest - I tell the clerks at check in that I have firearms as I unlock and open the case, I go through the showing they are unloaded, and I do what they ask. When you go from the check in to TSA make sure they escort you! The biggest issue I had was one time they just sent me over. The TSA agents were ready to explode ... They did explode! However, it was the check in guy that dang near got hauled off.
Enjoy the trip!