F9 4567 then UA 5090 at Denver
St Louis → Denver → Sheridan
Timetable, Denver time
21:30F9 4567 from St Louis at the gate
20:32UA 5090 to Sheridan leaves the gate
23 h 02 apart on the timetable, overnight
UA 5090 leaves 23 h 02 after F9 4567 arrives on the timetable: more than half a day, so not a connection we count.