AA 2488 then UA 4789 at O'Hare
Charlotte → Chicago → Fargo
Timetable, Chicago time
19:51AA 2488 from Charlotte at the gate
19:45UA 4789 to Fargo leaves the gate
23 h 54 apart on the timetable, overnight
UA 4789 leaves 23 h 54 after AA 2488 arrives on the timetable: more than half a day, so not a connection we count.