Originally Posted by
MSPeconomist
Welcome to FT, but I don't think you're flying Tehran-Atlanta without stopping to connect in a third country. Assuming that you don't have an extremely expensive full fare ticket, you cannot change the ATL-STL flight without paying more. To change it before taking the first flight, you would contact the travel agent of airline who sold you the ticket. (Alitalia?)
All flights in GDS from THR-ATL for a period of 2 weeks are showing connections.
IR isn't loaded in there anyways...