Flight Pierre Elliott Trudeau International Airport departs from Montreal Pierre Elliott Trudeau International Airport at 05:55 and arrives at Chicago O'Hare International Airport at 08:02.
The flighttime is about 3h 07m. The distance travelled ("as the bird flies"): 1575 Km. So the average speed is roughly 505 Km.
There is an 1 hour time difference between Montreal and Chicago