My dad being "the aviation expert" that he is, insists that Airtran and ATA are synonymous for each other ie. the same airline. I'm nearly 100% certain that they are two seperate airlines, not affiliated with each other. I tried to tell him that ATA is mainly a business/charter airline out of MDW & IND flying 727's, L-1011's, 753's, and 738's. While Airtran is the low cost operator out of ATL flying DC-9's and 717's. Who is correct? Can somebody prove my point to my dad.