CZ 435 then AA 492 at O'Hare
Anchorage → Chicago → Cancún
Timetable, Chicago time
15:58CZ 435 from Anchorage at the gate
10:05AA 492 to Cancún leaves the gate
18 h 07 apart on the timetable, overnight
AA 492 leaves 18 h 07 after CZ 435 arrives on the timetable: more than half a day, so not a connection we count.