DL 4097 then DL 854 at Atlanta
South Bend → Atlanta → Springfield
Timetable, Atlanta time
16:02DL 4097 from South Bend at the gate
13:50DL 854 to Springfield leaves the gate
21 h 48 apart on the timetable, overnight
DL 854 leaves 21 h 48 after DL 4097 arrives on the timetable: more than half a day, so not a connection we count.