CA 3103 then AA 4189 at O'Hare
Anchorage → Chicago → Missoula
Timetable, Chicago time
15:07CA 3103 from Anchorage at the gate
09:40AA 4189 to Missoula leaves the gate
18 h 33 apart on the timetable, overnight
AA 4189 leaves 18 h 33 after CA 3103 arrives on the timetable: more than half a day, so not a connection we count.