UA 5210 then AA 3449 at O'Hare
Saginaw → Chicago → Fargo
Timetable, Chicago time
10:10UA 5210 from Saginaw at the gate
10:00AA 3449 to Fargo leaves the gate
23 h 50 apart on the timetable, overnight
AA 3449 leaves 23 h 50 after UA 5210 arrives on the timetable: more than half a day, so not a connection we count.