AC 2129 then DL 8840 at Vancouver
Cancún → Vancouver → San Francisco
Timetable, Vancouver time
12:45AC 2129 from Cancún at the gate
15:53DL 8840 to San Francisco leaves the gate
3 h 08 apart on the timetable
The last days
AC 2129 and DL 8840 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.