AA 3407 then AA 1408 at DFW
Harlingen → Dallas-Fort Worth → Huatulco
Timetable, Dallas-Fort Worth time
20:28AA 3407 from Harlingen at the gate
10:49AA 1408 to Huatulco leaves the gate
14 h 21 apart on the timetable, overnight
AA 1408 leaves 14 h 21 after AA 3407 arrives on the timetable: more than half a day, so not a connection we count.