Flight Bandaranaike International Airport departs from Colombo Bandaranaike International Airport at 19:25 and arrives at Muscat International Airport at 21:55.
The flighttime is about 4h 00m. The distance travelled ("as the bird flies"): 2466 Km. So the average speed is roughly 616 Km.
There is an 1.5 hour time difference between Colombo and Muscat