Flight Keflavík International Airport departs from Reykjavik Keflavík International Airport at 10:00 and arrives at Boston General Edward Lawrence Logan International Airport at 11:35.
The flighttime is about 6h 35m. The distance travelled ("as the bird flies"): 5559 Km. So the average speed is roughly 844 Km.
There is an 5 hour time difference between Reykjavik and Boston