CV 12 then DL 2570 at O'Hare
Anchorage → Chicago → Boston
Timetable, Chicago time
19:11CV 12 from Anchorage at the gate
10:35DL 2570 to Boston leaves the gate
15 h 24 apart on the timetable, overnight
DL 2570 leaves 15 h 24 after CV 12 arrives on the timetable: more than half a day, so not a connection we count.