AA 3436 then UA 6080 at O'Hare
Rochester (ROC) → Chicago → Saginaw
Timetable, Chicago time
16:39AA 3436 from Rochester (ROC) at the gate
13:25UA 6080 to Saginaw leaves the gate
20 h 46 apart on the timetable, overnight
UA 6080 leaves 20 h 46 after AA 3436 arrives on the timetable: more than half a day, so not a connection we count.