WN 550 then WN 1749 at Denver
Nashville → Denver → Dallas
Timetable, Denver time
09:55WN 550 from Nashville at the gate
05:35WN 1749 to Dallas leaves the gate
19 h 40 apart on the timetable, overnight
WN 1749 leaves 19 h 40 after WN 550 arrives on the timetable: more than half a day, so not a connection we count.