ATA is American Trans Air. They were once the worlds largest charter airline. They've since gone scheduled and have concentrated more of their efforts in their scheduled markets instead of charter markets. They fly 727-200 and 757-200 aircraft, as well they fly brand spanking new 757-300 and 737-800 aircraft. From DCA I believe you would fly a 737-800 to Chicago Midway and then connect to their commuter affiliate, Chicago Express, which would be a Saab 340 prop airplane. The Saab is configured for 34 or so passengers with a Flight Attendant and lavatory facilities.

ATA is a no frills type of carrier. They don't offer a F/C cabin on their aircraft. On their new 757-300 and 737-800 aircraft they are fitted with all leather, coach seating. I don't think they offer IFE but could be wrong. They only offer snacks on board, chips, peanuts, that kind of thing.

Chicago Midway used to be a horrible facility and was worth avoiding. They've built a brand new facility there since I've last been and I hear it's very nice, very modern and very traveler friendly.

All in all ATA is a nice airline. It won't be like flying in First on UA but they are very safe and reasonably comfortable. Service is usally friendly and they are pretty reliable. Good luck!!!