AC 8256 then AC 1912 at Toronto Pearson
London (YXU) → Toronto → Ottawa
Timetable, Toronto time
10:09AC 8256 from London (YXU) at the gate
16:10AC 1912 to Ottawa leaves the gate
6 h 01 apart on the timetable
The last days
AC 8256 and AC 1912 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.