Flight Keflavík International Airport departs from Reykjavik Keflavík International Airport at 07:35 and arrives at Brussels Brussels Airport at 12:50.
The flighttime is about 3h 15m. The distance travelled ("as the bird flies"): 3331 Km. So the average speed is roughly 1025 Km.
There is an 2 hour time difference between Reykjavik and Brussels