CV 21 then B6 1012 at O'Hare
Anchorage → Chicago → Boston
Timetable, Chicago time
22:27CV 21 from Anchorage at the gate
20:15B6 1012 to Boston leaves the gate
21 h 48 apart on the timetable, overnight
B6 1012 leaves 21 h 48 after CV 21 arrives on the timetable: more than half a day, so not a connection we count.