Flight Heathrow Airport departs from London Heathrow Airport at 13:20 and arrives at Madrid Adolfo Suárez Madrid–Barajas Airport at 16:45.
The flighttime is about 2h 25m. The distance travelled ("as the bird flies"): 1268 Km. So the average speed is roughly 525 Km.
There is an 1 hour time difference between London and Madrid