AC 20 then AC 120 at Vancouver
Singapore → Vancouver → Toronto
Timetable, Vancouver time
07:45AC 20 from Singapore at the gate
14:30AC 120 to Toronto leaves the gate
6 h 45 apart on the timetable
The last days
AC 20 and AC 120 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.