Flight London Stansted Airport departs from London London Stansted Airport at 21:05 and arrives at Krakow John Paul II International Airport at 00:20.
The flighttime is about 2h 15m. The distance travelled ("as the bird flies"): 2183 Km. So the average speed is roughly 970 Km.
There is an 1 hour time difference between London and Krakow