CZ 435 then AA 2511 at O'Hare
Anchorage → Chicago → Boston
Timetable, Chicago time
17:05CZ 435 from Anchorage at the gate
07:00AA 2511 to Boston leaves the gate
13 h 55 apart on the timetable, overnight
AA 2511 leaves 13 h 55 after CZ 435 arrives on the timetable: more than half a day, so not a connection we count.