DL 2643 then DL 4097 at Atlanta
Montréal → Atlanta → South Bend
Timetable, Atlanta time
10:00DL 2643 from Montréal at the gate
09:10DL 4097 to South Bend leaves the gate
23 h 10 apart on the timetable, overnight
DL 4097 leaves 23 h 10 after DL 2643 arrives on the timetable: more than half a day, so not a connection we count.