AA 1845 then AA 5418 at DFW
Pittsburgh → Dallas-Fort Worth → Harlingen
Timetable, Dallas-Fort Worth time
09:34AA 1845 from Pittsburgh at the gate
21:48AA 5418 to Harlingen leaves the gate
12 h 14 apart on the timetable
AA 5418 leaves 12 h 14 after AA 1845 arrives on the timetable: more than half a day, so not a connection we count.