AA 5556 then AA 5418 at DFW
Roanoke → Dallas-Fort Worth → Harlingen
Timetable, Dallas-Fort Worth time
09:23AA 5556 from Roanoke at the gate
21:48AA 5418 to Harlingen leaves the gate
12 h 25 apart on the timetable
AA 5418 leaves 12 h 25 after AA 5556 arrives on the timetable: more than half a day, so not a connection we count.