Flight Cochin International Airport departs from Kochi Cochin International Airport at 23:00 and arrives at Muscat International Airport at 01:25.
The flighttime is about 3h 55m. The distance travelled ("as the bird flies"): 2071 Km. So the average speed is roughly 529 Km.
There is an 1.5 hour time difference between Kochi and Muscat