DL 1007 then DL 3026 at Atlanta
Washington National → Atlanta → Huntsville
Timetable, Atlanta time
21:41DL 1007 from Washington National at the gate
15:59DL 3026 to Huntsville leaves the gate
18 h 18 apart on the timetable, overnight
DL 3026 leaves 18 h 18 after DL 1007 arrives on the timetable: more than half a day, so not a connection we count.