Flight Tribhuvan International Airport departs from Kathmandu Tribhuvan International Airport at 10:15 and arrives at Doha International Airport at 13:05.
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 Wednesday and it would be best to avoid Tuesday, as prices are on average 283.65% higher than on Wednesday. (Average prices, based on 92033 datapoints.)
We have a lot more statistics for flights QR 653 and between Kathmandu and Doha.