UA 1565 then AA 1408 at DFW
Denver → Dallas-Fort Worth → Huatulco
Timetable, Dallas-Fort Worth time
20:43UA 1565 from Denver at the gate
10:49AA 1408 to Huatulco leaves the gate
14 h 06 apart on the timetable, overnight
AA 1408 leaves 14 h 06 after UA 1565 arrives on the timetable: more than half a day, so not a connection we count.