Flight International Airport departs from Doha International Airport at 11:50 and arrives at Kathmandu Tribhuvan International Airport at 18:40.
The flighttime is about 3h 50m. The distance travelled ("as the bird flies"): 3758 Km. So the average speed is roughly 980 Km.
There is an 3 hour time difference between Doha and Kathmandu
The best day to arrive at Doha is Friday and it would be best to avoid Saturday, as prices are on average 479.2% higher than on Friday. (Average prices, based on 113589 datapoints.)
We have a lot more statistics for flights QR 650 and between Doha and Kathmandu.