UA 2270 then WN 1749 at Denver
Norfolk → Denver → Dallas
Timetable, Denver time
10:17UA 2270 from Norfolk at the gate
05:35WN 1749 to Dallas leaves the gate
19 h 18 apart on the timetable, overnight
WN 1749 leaves 19 h 18 after UA 2270 arrives on the timetable: more than half a day, so not a connection we count.