Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 14:05 and arrives at Siem Reap Siem Reap-Angkor International Airport at 15:15.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 340 Km. So the average speed is roughly 291 Km.
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Saturday, as prices are on average 29.61% higher than on Tuesday. (Average prices, based on 336092 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 114 datapoints.)
We have a lot more statistics for flights PG 913 and between Bangkok and Siem Reap.