HU 495 then AC 7052 at Vancouver
Beijing → Vancouver → Calgary
Timetable, Vancouver time
09:07HU 495 from Beijing at the gate
12:20AC 7052 to Calgary leaves the gate
3 h 13 apart on the timetable
The last days
HU 495 and AC 7052 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.