C8 82 then UA 1580 at O'Hare
Anchorage → Chicago → Boston
Timetable, Chicago time
18:28C8 82 from Anchorage at the gate
12:46UA 1580 to Boston leaves the gate
18 h 18 apart on the timetable, overnight
UA 1580 leaves 18 h 18 after C8 82 arrives on the timetable: more than half a day, so not a connection we count.