Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 09:55 and arrives at Luang Prabang Luang Prabang International Airport at 12:05.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 208 Km. So the average speed is roughly 178 Km.
There is an 1 hour time difference between Bangkok and Luang Prabang