DL 516 then DL 4097 at Atlanta
Dallas → Atlanta → South Bend
Timetable, Atlanta time
09:15DL 516 from Dallas at the gate
09:10DL 4097 to South Bend leaves the gate
23 h 55 apart on the timetable, overnight
DL 4097 leaves 23 h 55 after DL 516 arrives on the timetable: more than half a day, so not a connection we count.