F9 45 then UA 6080 at O'Hare
Cancún → Chicago → Saginaw
Timetable, Chicago time
14:45F9 45 from Cancún at the gate
12:40UA 6080 to Saginaw leaves the gate
21 h 55 apart on the timetable, overnight
UA 6080 leaves 21 h 55 after F9 45 arrives on the timetable: more than half a day, so not a connection we count.