AA 2421 then OO 6080 at O'Hare
Dallas-Fort Worth → Chicago → Saginaw
Timetable, Chicago time
16:00AA 2421 from Dallas-Fort Worth at the gate
13:25OO 6080 to Saginaw leaves the gate
21 h 25 apart on the timetable, overnight
OO 6080 leaves 21 h 25 after AA 2421 arrives on the timetable: more than half a day, so not a connection we count.