I prefer Alaska, but not sure if they have flights from GA. Be careful with Southwest Airlines. They do not accept any pets in cabin. Our friends bought tickets from that company for us, and I had to cancel it because of company rules. I cannot even imagine my baby will fly cargo. NOOOOO way....
BTW, I was told to put my dog under front seat
every time when I tried to take her out to be on my lap. Seems like those attendants just not dog friendly people....