Flight Heathrow Airport departs from London Heathrow Airport at 12:05 and arrives at Toronto Lester B. Pearson International Airport at 14:50.
The flighttime is about 7h 45m. The distance travelled ("as the bird flies"): 8814 Km. So the average speed is roughly 1137 Km.
There is an 5 hour time difference between London and Toronto