AC 2129 then F8 808 at Vancouver
Cancún → Vancouver → Calgary
Timetable, Vancouver time
12:45AC 2129 from Cancún at the gate
18:15F8 808 to Calgary leaves the gate
5 h 30 apart on the timetable
The last days
AC 2129 and F8 808 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.