F9 4567 then WN 1672 at Denver
St Louis → Denver → Los Angeles
Timetable, Denver time
21:30F9 4567 from St Louis at the gate
20:45WN 1672 to Los Angeles leaves the gate
23 h 15 apart on the timetable, overnight
WN 1672 leaves 23 h 15 after F9 4567 arrives on the timetable: more than half a day, so not a connection we count.