UA 1388 then AA 1408 at DFW
Houston → Dallas-Fort Worth → Huatulco
Timetable, Dallas-Fort Worth time
16:07UA 1388 from Houston at the gate
10:23AA 1408 to Huatulco leaves the gate
18 h 16 apart on the timetable, overnight
AA 1408 leaves 18 h 16 after UA 1388 arrives on the timetable: more than half a day, so not a connection we count.