AA 1768 then AA 5418 at DFW
New Orleans → Dallas-Fort Worth → Harlingen
Timetable, Dallas-Fort Worth time
09:39AA 1768 from New Orleans at the gate
21:48AA 5418 to Harlingen leaves the gate
12 h 09 apart on the timetable
AA 5418 leaves 12 h 09 after AA 1768 arrives on the timetable: more than half a day, so not a connection we count.