AA 4291 then UA 4772 at O'Hare
Kalispell → Chicago → Columbia Regional
Timetable, Chicago time
18:33AA 4291 from Kalispell at the gate
12:45UA 4772 to Columbia Regional leaves the gate
18 h 12 apart on the timetable, overnight
UA 4772 leaves 18 h 12 after AA 4291 arrives on the timetable: more than half a day, so not a connection we count.