UA 1341 then AC 744 at San Francisco
Detroit → San Francisco → Toronto
Timetable, San Francisco time
19:31UA 1341 from Detroit at the gatealso OZ 9538
16:40AC 744 to Toronto leaves the gatealso NZ 4501, NZ 4503, UA 8396
21 h 09 apart on the timetable, overnight
AC 744 leaves 21 h 09 after UA 1341 arrives on the timetable: more than half a day, so not a connection we count.