Flight Keflavík International Airport departs from Reykjavik Keflavík International Airport at 07:40 and arrives at Dublin Dublin Airport at 10:15.
The flighttime is about 1h 35m. The distance travelled ("as the bird flies"): 2141 Km. So the average speed is roughly 1352 Km.
There is an 1 hour time difference between Reykjavik and Dublin