Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 21:15 and arrives at Kathmandu Tribhuvan International Airport at 23:25.
The flighttime is about 3h 10m. The distance travelled ("as the bird flies"): 1701 Km. So the average speed is roughly 537 Km.
There is an 1 hour time difference between Bangkok and Kathmandu
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