AA 3683 then UA 4789 at O'Hare
Bangor → Chicago → Fargo
Timetable, Chicago time
20:09AA 3683 from Bangor at the gate
19:45UA 4789 to Fargo leaves the gate
23 h 36 apart on the timetable, overnight
UA 4789 leaves 23 h 36 after AA 3683 arrives on the timetable: more than half a day, so not a connection we count.