Flight Heathrow Airport departs from London Heathrow Airport at 21:30 and arrives at Colombo Bandaranaike International Airport at 12:45.
The flighttime is about 10h 45m. The distance travelled ("as the bird flies"): 9255 Km. So the average speed is roughly 861 Km.
There is an 4.5 hour time difference between London and Colombo
