AA 6448 then AA 1408 at DFW
South Bend → Dallas-Fort Worth → Huatulco
Timetable, Dallas-Fort Worth time
19:53AA 6448 from South Bend at the gate
10:23AA 1408 to Huatulco leaves the gate
14 h 30 apart on the timetable, overnight
AA 1408 leaves 14 h 30 after AA 6448 arrives on the timetable: more than half a day, so not a connection we count.