AA 9936 then AC 123 at Toronto Pearson
Pittsburgh → Toronto → Vancouver
Timetable, Toronto time
11:10AA 9936 from Pittsburgh at the gate
15:45AC 123 to Vancouver leaves the gate
4 h 35 apart on the timetable
The last days
AA 9936 and AC 123 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.