CA 8443 then DL 2570 at O'Hare
Anchorage → Chicago → Boston
Timetable, Chicago time
16:59CA 8443 from Anchorage at the gate
10:35DL 2570 to Boston leaves the gate
17 h 36 apart on the timetable, overnight
DL 2570 leaves 17 h 36 after CA 8443 arrives on the timetable: more than half a day, so not a connection we count.