Flight Copenhagen Airport, Kastrup departs from Copenhagen Copenhagen Airport, Kastrup at 16:50 and arrives at Reykjavik Keflavík International Airport at 18:05.
The flighttime is about 3h 15m. The distance travelled ("as the bird flies"): 4025 Km. So the average speed is roughly 1238 Km.
There is an 2 hour time difference between Copenhagen and Reykjavik