PD 277 then WS 9580 at Toronto Pearson
Ottawa → Toronto → Montréal
Timetable, Toronto time
23:36PD 277 from Ottawa at the gate
06:30WS 9580 to Montréal leaves the gate
6 h 54 apart on the timetable, overnight
The last days
PD 277 and WS 9580 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.