Flight Copenhagen Airport, Kastrup departs from Copenhagen Copenhagen Airport, Kastrup at 08:15 and arrives at Reykjavik Keflavík International Airport at 10:40.
The flighttime is about 4h 25m. The distance travelled ("as the bird flies"): 4025 Km. So the average speed is roughly 911 Km.
There is an 2 hour time difference between Copenhagen and Reykjavik