Columbus is closer that Atlanta. But it is really small, and it probably only flies to a small radius of cities. If you are flying across country you will probably have to fly into Atlanta and either drive to Fort Benning or catch a connection to Columbus and drive to Fort Benning (I think about 20 minutes from airport).
Other things to consider:1. You ll definitely get a flight into Atlanta HJ, maybe not into Columbus2. You ll pay far less for your flight into Atlanta, as it is a hub3. You ll fly directly into Atlanta, maybe connect to get to Columbus4. You ll find abundant transportation options in AtlantaI d say, even if Atlanta is 100 miles further to Fort Benning, fly into the A
Remember you could consider Atlanta, GA , Columbus, GA or Birmingham Al. It depends on where you wish to fly. Check the rates from all three.
Columbus would be the closer choice, but Atlanta would be the cheaper choice.
I think Atlanta Hartsfield Int l airport, Not sure though,pls confirm