F9 4567 then WN 2827 at Denver
St Louis → Denver → Ontario
Timetable, Denver time
21:30F9 4567 from St Louis at the gate
21:20WN 2827 to Ontario leaves the gate
23 h 50 apart on the timetable, overnight
WN 2827 leaves 23 h 50 after F9 4567 arrives on the timetable: more than half a day, so not a connection we count.