DL 343 then DL 4097 at Atlanta
Washington National → Atlanta → South Bend
Timetable, Atlanta time
09:55DL 343 from Washington National at the gate
09:10DL 4097 to South Bend leaves the gate
23 h 15 apart on the timetable, overnight
DL 4097 leaves 23 h 15 after DL 343 arrives on the timetable: more than half a day, so not a connection we count.