AA 725 then UA 6080 at O'Hare
Los Angeles → Chicago → Saginaw
Timetable, Chicago time
16:05AA 725 from Los Angeles at the gate
12:40UA 6080 to Saginaw leaves the gate
20 h 35 apart on the timetable, overnight
UA 6080 leaves 20 h 35 after AA 725 arrives on the timetable: more than half a day, so not a connection we count.