WN 209 then WN 244 at Denver
St Louis → Denver → Seattle
Timetable, Denver time
18:50WN 209 from St Louis at the gate
15:45WN 244 to Seattle leaves the gate
20 h 55 apart on the timetable, overnight
WN 244 leaves 20 h 55 after WN 209 arrives on the timetable: more than half a day, so not a connection we count.