WN 209 then UA 2240 at Denver
St Louis → Denver → Los Angeles
Timetable, Denver time
18:50WN 209 from St Louis at the gate
17:50UA 2240 to Los Angeles leaves the gate
23 h apart on the timetable, overnight
UA 2240 leaves 23 h after WN 209 arrives on the timetable: more than half a day, so not a connection we count.