DL 554 then DL 4109 at Atlanta
Seattle → Atlanta → South Bend
Timetable, Atlanta time
19:53DL 554 from Seattle at the gate
19:52DL 4109 to South Bend leaves the gate
23 h 59 apart on the timetable, overnight
DL 4109 leaves 23 h 59 after DL 554 arrives on the timetable: more than half a day, so not a connection we count.