UA 2383 then WN 1749 at Denver
Phoenix Sky Harbor → Denver → Dallas
Timetable, Denver time
08:10UA 2383 from Phoenix Sky Harbor at the gate
05:35WN 1749 to Dallas leaves the gate
21 h 25 apart on the timetable, overnight
WN 1749 leaves 21 h 25 after UA 2383 arrives on the timetable: more than half a day, so not a connection we count.