AA 4189 then UA 5940 at O'Hare
Missoula → Chicago → Peoria
Timetable, Chicago time
17:52AA 4189 from Missoula at the gate
16:40UA 5940 to Peoria leaves the gate
22 h 48 apart on the timetable, overnight
UA 5940 leaves 22 h 48 after AA 4189 arrives on the timetable: more than half a day, so not a connection we count.