AA 2787 then AA 5418 at DFW
Nashville → Dallas-Fort Worth → Harlingen
Timetable, Dallas-Fort Worth time
09:27AA 2787 from Nashville at the gate
21:48AA 5418 to Harlingen leaves the gate
12 h 21 apart on the timetable
AA 5418 leaves 12 h 21 after AA 2787 arrives on the timetable: more than half a day, so not a connection we count.