AA 3312 then UA 6080 at O'Hare
Las Vegas → Chicago → Saginaw
Timetable, Chicago time
15:53AA 3312 from Las Vegas at the gate
13:25UA 6080 to Saginaw leaves the gate
21 h 32 apart on the timetable, overnight
UA 6080 leaves 21 h 32 after AA 3312 arrives on the timetable: more than half a day, so not a connection we count.