DL 1007 then DL 5104 at Atlanta
Washington National → Atlanta → Columbia
Timetable, Atlanta time
21:41DL 1007 from Washington National at the gate
14:35DL 5104 to Columbia leaves the gate
16 h 54 apart on the timetable, overnight
DL 5104 leaves 16 h 54 after DL 1007 arrives on the timetable: more than half a day, so not a connection we count.