AA 5200 then AA 5418 at DFW
Baton Rouge → Dallas-Fort Worth → Harlingen
Timetable, Dallas-Fort Worth time
09:46AA 5200 from Baton Rouge at the gate
21:48AA 5418 to Harlingen leaves the gate
12 h 02 apart on the timetable
AA 5418 leaves 12 h 02 after AA 5200 arrives on the timetable: more than half a day, so not a connection we count.