DL 4097 then DL 726 at Atlanta
South Bend → Atlanta → Boston
Timetable, Atlanta time
13:56DL 4097 from South Bend at the gate
13:50DL 726 to Boston leaves the gate
23 h 54 apart on the timetable, overnight
DL 726 leaves 23 h 54 after DL 4097 arrives on the timetable: more than half a day, so not a connection we count.