UA 1341 then AC 742 at San Francisco
Detroit → San Francisco → Toronto
Timetable, San Francisco time
19:31UA 1341 from Detroit at the gatealso OZ 9538
14:00AC 742 to Toronto leaves the gatealso UA 8128, OS 8191, OS 8357
18 h 29 apart on the timetable, overnight
AC 742 leaves 18 h 29 after UA 1341 arrives on the timetable: more than half a day, so not a connection we count.