AA 2436 then UA 6080 at O'Hare
San Francisco → Chicago → Saginaw
Timetable, Chicago time
15:15AA 2436 from San Francisco at the gate
13:25UA 6080 to Saginaw leaves the gate
22 h 10 apart on the timetable, overnight
UA 6080 leaves 22 h 10 after AA 2436 arrives on the timetable: more than half a day, so not a connection we count.