Flight Lester B. Pearson International Airport departs from Toronto Lester B. Pearson International Airport at 13:50 and arrives at Chicago O'Hare International Airport at 14:39.
The flighttime is about 1h 49m. The distance travelled ("as the bird flies"): 920 Km. So the average speed is roughly 506 Km.
There is an 1 hour time difference between Toronto and Chicago