AA 1296 then AA 5418 at DFW
Indianapolis → Dallas-Fort Worth → Harlingen
Timetable, Dallas-Fort Worth time
09:36AA 1296 from Indianapolis at the gate
21:48AA 5418 to Harlingen leaves the gate
12 h 12 apart on the timetable
AA 5418 leaves 12 h 12 after AA 1296 arrives on the timetable: more than half a day, so not a connection we count.