AA 6507 then UA 4789 at O'Hare
Milwaukee → Chicago → Fargo
Timetable, Chicago time
20:49AA 6507 from Milwaukee at the gate
19:45UA 4789 to Fargo leaves the gate
22 h 56 apart on the timetable, overnight
UA 4789 leaves 22 h 56 after AA 6507 arrives on the timetable: more than half a day, so not a connection we count.