AA 6291 then UA 6080 at O'Hare
Oklahoma City → Chicago → Saginaw
Timetable, Chicago time
15:30AA 6291 from Oklahoma City at the gate
13:25UA 6080 to Saginaw leaves the gate
21 h 55 apart on the timetable, overnight
UA 6080 leaves 21 h 55 after AA 6291 arrives on the timetable: more than half a day, so not a connection we count.