UA 1297 then WN 1749 at Denver
Phoenix Sky Harbor → Denver → Dallas
Timetable, Denver time
12:45UA 1297 from Phoenix Sky Harbor at the gate
05:35WN 1749 to Dallas leaves the gate
16 h 50 apart on the timetable, overnight
WN 1749 leaves 16 h 50 after UA 1297 arrives on the timetable: more than half a day, so not a connection we count.