UA 5210 then AA 1898 at O'Hare
Saginaw → Chicago → Jackson
Timetable, Chicago time
14:15UA 5210 from Saginaw at the gate
09:58AA 1898 to Jackson leaves the gate
19 h 43 apart on the timetable, overnight
AA 1898 leaves 19 h 43 after UA 5210 arrives on the timetable: more than half a day, so not a connection we count.