F9 4567 then WN 290 at Denver
St Louis → Denver → Montrose
Timetable, Denver time
21:30F9 4567 from St Louis at the gate
18:50WN 290 to Montrose leaves the gate
21 h 20 apart on the timetable, overnight
WN 290 leaves 21 h 20 after F9 4567 arrives on the timetable: more than half a day, so not a connection we count.