WN 536 then WN 2170 at Denver
Dallas → Denver → St Louis
Timetable, Denver time
14:55WN 536 from Dallas at the gate
14:20WN 2170 to St Louis leaves the gate
23 h 25 apart on the timetable, overnight
WN 2170 leaves 23 h 25 after WN 536 arrives on the timetable: more than half a day, so not a connection we count.