DL 1007 then DL 1251 at Atlanta
Washington National → Atlanta → Tucson
Timetable, Atlanta time
21:41DL 1007 from Washington National at the gate
20:59DL 1251 to Tucson leaves the gate
23 h 18 apart on the timetable, overnight
DL 1251 leaves 23 h 18 after DL 1007 arrives on the timetable: more than half a day, so not a connection we count.