AC 1557 then PB 834 at Montréal
Newark → Montréal → Quebec
Timetable, Montréal time
11:51AC 1557 from Newark at the gate
15:25PB 834 to Quebec leaves the gate
3 h 34 apart on the timetable
The last days
AC 1557 and PB 834 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.