AS 634 then AC 744 at San Francisco
Las Vegas → San Francisco → Toronto
Timetable, San Francisco time
17:41AS 634 from Las Vegas at the gatealso QF 3697, FJ 5841, AA 7412, CX 7935, QR 8861
16:40AC 744 to Toronto leaves the gatealso NZ 4501, NZ 4503, UA 8396
22 h 59 apart on the timetable, overnight
AC 744 leaves 22 h 59 after AS 634 arrives on the timetable: more than half a day, so not a connection we count.