Flight Tribhuvan International Airport departs from Kathmandu Tribhuvan International Airport at 18:20 and arrives at Bangkok Don Mueang International Airport at 22:45.
The flighttime is about 3h 25m. The distance travelled ("as the bird flies"): 1684 Km. So the average speed is roughly 493 Km.
There is an 1 hour time difference between Kathmandu and Bangkok
The best month to arrive at Kathmandu is July and the most expensive month to fly is June. (Average prices, based on 345 datapoints.)
The best day to arrive at Kathmandu is Monday and it would be best to avoid Tuesday, as prices are on average 45.67% higher than on Monday. (Average prices, based on 165544 datapoints.)
We have a lot more statistics for flights SL 221 and between Kathmandu and Bangkok.