Flight Keflavík International Airport departs from Reykjavik Keflavík International Airport at 12:20 and arrives at London London Stansted Airport at 15:30.
The flighttime is about 2h 10m. The distance travelled ("as the bird flies"): 2858 Km. So the average speed is roughly 1319 Km.
There is an 1 hour time difference between Reykjavik and London