Flight Tribhuvan International Airport departs from Kathmandu Tribhuvan International Airport at 02:15 and arrives at Doha International Airport at 05:05.
The flighttime is about 5h 50m. The distance travelled ("as the bird flies"): 3758 Km. So the average speed is roughly 644 Km.
There is an 3 hour time difference between Kathmandu and Doha
The best day to arrive at Kathmandu is Sunday and it would be best to avoid Monday, as prices are on average 263.9% higher than on Sunday. (Average prices, based on 92064 datapoints.)
We have a lot more statistics for flights QR 645 and between Kathmandu and Doha.