UA 5989 then WN 482 at Denver
Lubbock → Denver → Montrose
Timetable, Denver time
18:16UA 5989 from Lubbock at the gate
17:25WN 482 to Montrose leaves the gate
23 h 09 apart on the timetable, overnight
WN 482 leaves 23 h 09 after UA 5989 arrives on the timetable: more than half a day, so not a connection we count.