DL 1007 then DL 1481 at Atlanta
Washington National → Atlanta → Louisville
Timetable, Atlanta time
21:41DL 1007 from Washington National at the gate
10:35DL 1481 to Louisville leaves the gate
12 h 54 apart on the timetable, overnight
DL 1481 leaves 12 h 54 after DL 1007 arrives on the timetable: more than half a day, so not a connection we count.