Flight Tribhuvan International Airport departs from Kathmandu Tribhuvan International Airport at 20:40 and arrives at Kuala Lumpur Kuala Lumpur International Airport at 03:25.
The flighttime is about 4h 45m. The distance travelled ("as the bird flies"): 1782 Km. So the average speed is roughly 375 Km.
There is an 2 hour time difference between Kathmandu and Kuala Lumpur