CZ 435 then AA 3657 at O'Hare
Anchorage → Chicago → Key West
Timetable, Chicago time
15:58CZ 435 from Anchorage at the gate
07:30AA 3657 to Key West leaves the gate
15 h 32 apart on the timetable, overnight
AA 3657 leaves 15 h 32 after CZ 435 arrives on the timetable: more than half a day, so not a connection we count.