Flight Tribhuvan International Airport departs from Kathmandu Tribhuvan International Airport at 02:00 and arrives at Kuwait City Kuwait International Airport at 05:10.
The flighttime is about 6h 10m. The distance travelled ("as the bird flies"): 4158 Km. So the average speed is roughly 674 Km.
There is an 3 hour time difference between Kathmandu and Kuwait City