CZ 435 then AA 3697 at O'Hare
Anchorage → Chicago → Missoula
Timetable, Chicago time
15:58CZ 435 from Anchorage at the gate
09:40AA 3697 to Missoula leaves the gate
17 h 42 apart on the timetable, overnight
AA 3697 leaves 17 h 42 after CZ 435 arrives on the timetable: more than half a day, so not a connection we count.