UA 779 then WN 1749 at Denver
Austin → Denver → Dallas
Timetable, Denver time
12:10UA 779 from Austin at the gate
05:35WN 1749 to Dallas leaves the gate
17 h 25 apart on the timetable, overnight
WN 1749 leaves 17 h 25 after UA 779 arrives on the timetable: more than half a day, so not a connection we count.