UA 6098 then AC 8550 at O'Hare
Saginaw → Chicago → Toronto (YTZ)
Timetable, Chicago time
20:10UA 6098 from Saginaw at the gate
13:55AC 8550 to Toronto (YTZ) leaves the gate
17 h 45 apart on the timetable, overnight
AC 8550 leaves 17 h 45 after UA 6098 arrives on the timetable: more than half a day, so not a connection we count.