Flight Bandaranaike International Airport departs from Colombo Bandaranaike International Airport at 22:55 and arrives at Kuala Lumpur Kuala Lumpur International Airport at 05:10.
The flighttime is about 3h 45m. The distance travelled ("as the bird flies"): 2425 Km. So the average speed is roughly 647 Km.
There is an 2.5 hour time difference between Colombo and Kuala Lumpur