DL 519 then WN 451 at Denver
Atlanta → Denver → Houston Hobby
Timetable, Denver time
18:31DL 519 from Atlanta at the gate
18:30WN 451 to Houston Hobby leaves the gate
23 h 59 apart on the timetable, overnight
WN 451 leaves 23 h 59 after DL 519 arrives on the timetable: more than half a day, so not a connection we count.