UA 414 then AA 1408 at DFW
Denver → Dallas-Fort Worth → Huatulco
Timetable, Dallas-Fort Worth time
18:42UA 414 from Denver at the gate
10:49AA 1408 to Huatulco leaves the gate
16 h 07 apart on the timetable, overnight
AA 1408 leaves 16 h 07 after UA 414 arrives on the timetable: more than half a day, so not a connection we count.