AA 3739 then UA 6080 at O'Hare
Omaha → Chicago → Saginaw
Timetable, Chicago time
14:12AA 3739 from Omaha at the gate
13:25UA 6080 to Saginaw leaves the gate
23 h 13 apart on the timetable, overnight
UA 6080 leaves 23 h 13 after AA 3739 arrives on the timetable: more than half a day, so not a connection we count.