I have taken the flight a couple times from Pittsburgh to San Antonio and the first time my flight got jumbled up due to Chicago Midway being on a ground stop but they got my on another plane to Atlanta and I arrived in San Antonio a little after my original arrival time. The second time not only did I arrive in San Antonio on time but we were almost an hour early! There are no direct flights on SW from Pit to San Antonio but I have never had a problem with my layover or connections.