WN 209 then UA 5879 at Denver
St Louis → Denver → Shreveport
Timetable, Denver time
18:50WN 209 from St Louis at the gate
17:40UA 5879 to Shreveport leaves the gate
22 h 50 apart on the timetable, overnight
UA 5879 leaves 22 h 50 after WN 209 arrives on the timetable: more than half a day, so not a connection we count.