AC 601 then AC 7166 at Toronto Pearson
Halifax → Toronto → Montréal
Timetable, Toronto time
07:49AC 601 from Halifax at the gate
12:30AC 7166 to Montréal leaves the gate
4 h 41 apart on the timetable
The last days
AC 601 and AC 7166 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.