AC 312 then AC 523 at Montréal
Vancouver → Montréal → Chicago O'Hare
Timetable, Montréal time
07:30AC 312 from Vancouver at the gate
13:10AC 523 to Chicago O'Hare leaves the gate
5 h 40 apart on the timetable
The last days
AC 312 and AC 523 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.