Flight Chhatrapati Shivaji International Airport departs from Mumbai Chhatrapati Shivaji International Airport at 10:40 and arrives at London Heathrow Airport at 16:15.
The flighttime is about 11h 05m. The distance travelled ("as the bird flies"): 8456 Km. So the average speed is roughly 763 Km.
There is an 5.5 hour time difference between Mumbai and London