AA 4545 then UA 4789 at O'Hare
Tulsa → Chicago → Fargo
Timetable, Chicago time
20:05AA 4545 from Tulsa at the gate
19:45UA 4789 to Fargo leaves the gate
23 h 40 apart on the timetable, overnight
UA 4789 leaves 23 h 40 after AA 4545 arrives on the timetable: more than half a day, so not a connection we count.