AC 1505 then AC 488 at Toronto Pearson
Newark → Toronto → Montréal
Timetable, Toronto time
12:56AC 1505 from Newark at the gate
16:30AC 488 to Montréal leaves the gate
3 h 34 apart on the timetable
The last days
AC 1505 and AC 488 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.