Flight Václav Havel Airport Prague departs from Prague Václav Havel Airport Prague at 17:15 and arrives at London Heathrow Airport at 18:25.
The flighttime is about 2h 10m. The distance travelled ("as the bird flies"): 1644 Km. So the average speed is roughly 759 Km.
There is an 1 hour time difference between Prague and London