DL 4107 then DL 1374 at Atlanta
South Bend → Atlanta → Louisville
Timetable, Atlanta time
08:15DL 4107 from South Bend at the gate
07:45DL 1374 to Louisville leaves the gate
23 h 30 apart on the timetable, overnight
DL 1374 leaves 23 h 30 after DL 4107 arrives on the timetable: more than half a day, so not a connection we count.