AC 1973 then AC 421 at Montréal
Quebec → Montréal → Toronto Pearson
Timetable, Montréal time
08:02AC 1973 from Quebec at the gate
17:10AC 421 to Toronto Pearson leaves the gate
9 h 08 apart on the timetable
The last days
AC 1973 and AC 421 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.