F9 4567 then UA 4712 at Denver
St Louis → Denver → Tulsa
Timetable, Denver time
21:30F9 4567 from St Louis at the gate
21:00UA 4712 to Tulsa leaves the gate
23 h 30 apart on the timetable, overnight
UA 4712 leaves 23 h 30 after F9 4567 arrives on the timetable: more than half a day, so not a connection we count.