AA 3789 then AA 1408 at DFW
Amarillo → Dallas-Fort Worth → Huatulco
Timetable, Dallas-Fort Worth time
20:30AA 3789 from Amarillo at the gate
10:23AA 1408 to Huatulco leaves the gate
13 h 53 apart on the timetable, overnight
AA 1408 leaves 13 h 53 after AA 3789 arrives on the timetable: more than half a day, so not a connection we count.