CA 3103 then DL 2570 at O'Hare
Anchorage → Chicago → Boston
Timetable, Chicago time
15:07CA 3103 from Anchorage at the gate
10:35DL 2570 to Boston leaves the gate
19 h 28 apart on the timetable, overnight
DL 2570 leaves 19 h 28 after CA 3103 arrives on the timetable: more than half a day, so not a connection we count.