AA 4189 then UA 3910 at O'Hare
Missoula → Chicago → Newark
Timetable, Chicago time
17:52AA 4189 from Missoula at the gate
07:30UA 3910 to Newark leaves the gate
13 h 38 apart on the timetable, overnight
UA 3910 leaves 13 h 38 after AA 4189 arrives on the timetable: more than half a day, so not a connection we count.