Flight Heathrow Airport departs from London Heathrow Airport at 21:25 and arrives at Reykjavik Keflavík International Airport at 23:35. The flighttime is about 3h 10m. The distance travelled ("as the bird flies"): 2810 Km. So the average speed is roughly 887 Km. There is an 1 hour time difference between London and Reykjavik