WN 209 then WN 776 at Denver
St Louis → Denver → Chicago Midway
Timetable, Denver time
18:50WN 209 from St Louis at the gate
18:45WN 776 to Chicago Midway leaves the gate
23 h 55 apart on the timetable, overnight
WN 776 leaves 23 h 55 after WN 209 arrives on the timetable: more than half a day, so not a connection we count.