AA 2370 then AA 5418 at DFW
Columbia Metropolitan → Dallas-Fort Worth → Harlingen
Timetable, Dallas-Fort Worth time
09:25AA 2370 from Columbia Metropolitan at the gate
21:48AA 5418 to Harlingen leaves the gate
12 h 23 apart on the timetable
AA 5418 leaves 12 h 23 after AA 2370 arrives on the timetable: more than half a day, so not a connection we count.