Flight Keflavík International Airport departs from Reykjavik Keflavík International Airport at 07:35 and arrives at Stockholm Stockholm Arlanda Airport at 11:45.
The flighttime is about 3h 10m. The distance travelled ("as the bird flies"): 4530 Km. So the average speed is roughly 1431 Km.
There is an 1 hour time difference between Reykjavik and Stockholm