DL 519 then WN 3728 at Denver
Atlanta → Denver → Santa Ana
Timetable, Denver time
18:31DL 519 from Atlanta at the gate
18:20WN 3728 to Santa Ana leaves the gate
23 h 49 apart on the timetable, overnight
WN 3728 leaves 23 h 49 after DL 519 arrives on the timetable: more than half a day, so not a connection we count.