Flight Modlin Airport departs from Warsaw Modlin Airport at 18:20 and arrives at Athens Athens International Airport Eleftherios Venizelos at 22:00.
The flighttime is about 2h 40m. The distance travelled ("as the bird flies"): 1537 Km. So the average speed is roughly 576 Km.
There is an 1 hour time difference between Warsaw and Athens
