Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 06:30 and arrives at Koh Samui Samui International Airport at 07:40.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 113 Km. So the average speed is roughly 97 Km.
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Sunday, as prices are on average 188.59% higher than on Tuesday. (Average prices, based on 5119633 datapoints.)
We have a lot more statistics for flights PG 107 and between Bangkok and Koh Samui.
