F9 4567 then DL 2176 at Denver
St Louis → Denver → Los Angeles
Timetable, Denver time
21:30F9 4567 from St Louis at the gate
19:56DL 2176 to Los Angeles leaves the gate
22 h 26 apart on the timetable, overnight
DL 2176 leaves 22 h 26 after F9 4567 arrives on the timetable: more than half a day, so not a connection we count.