F9 2292 then DL 855 at Atlanta
Chicago Midway → Atlanta → Boston
Timetable, Atlanta time
10:29F9 2292 from Chicago Midway at the gate
10:05DL 855 to Boston leaves the gate
23 h 36 apart on the timetable, overnight
DL 855 leaves 23 h 36 after F9 2292 arrives on the timetable: more than half a day, so not a connection we count.