CZ 435 then AA 2389 at O'Hare
Anchorage → Chicago → Calgary
Timetable, Chicago time
15:58CZ 435 from Anchorage at the gate
10:00AA 2389 to Calgary leaves the gate
18 h 02 apart on the timetable, overnight
AA 2389 leaves 18 h 02 after CZ 435 arrives on the timetable: more than half a day, so not a connection we count.