UA 2116 then AA 1408 at DFW
Washington → Dallas-Fort Worth → Huatulco
Timetable, Dallas-Fort Worth time
20:39UA 2116 from Washington at the gate
10:49AA 1408 to Huatulco leaves the gate
14 h 10 apart on the timetable, overnight
AA 1408 leaves 14 h 10 after UA 2116 arrives on the timetable: more than half a day, so not a connection we count.