DL 519 then WN 235 at Denver
Atlanta → Denver → Dallas
Timetable, Denver time
18:31DL 519 from Atlanta at the gate
18:00WN 235 to Dallas leaves the gate
23 h 29 apart on the timetable, overnight
WN 235 leaves 23 h 29 after DL 519 arrives on the timetable: more than half a day, so not a connection we count.