Flight Barcelona–El Prat Airport departs from Barcelona Barcelona–El Prat Airport at 20:45 and arrives at Athens Athens International Airport Eleftherios Venizelos at 00:40.
The flighttime is about 2h 55m. The distance travelled ("as the bird flies"): 2458 Km. So the average speed is roughly 843 Km.
There is an 1 hour time difference between Barcelona and Athens
