DL 1007 then WN 1572 at Atlanta
Washington National → Atlanta → Denver
Timetable, Atlanta time
21:41DL 1007 from Washington National at the gate
18:10WN 1572 to Denver leaves the gate
20 h 29 apart on the timetable, overnight
WN 1572 leaves 20 h 29 after DL 1007 arrives on the timetable: more than half a day, so not a connection we count.