CA 993 then RJ 272 at Toronto Pearson
Beijing → Toronto → Montréal
Timetable, Toronto time
12:10CA 993 from Beijing at the gate
19:25RJ 272 to Montréal leaves the gate
7 h 15 apart on the timetable
The last days
CA 993 and RJ 272 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.