Flight Samui International Airport departs from Koh Samui Samui International Airport at 18:35 and arrives at Phuket Phuket International Airport at 19:35.
The flighttime is about 1h 00m. The distance travelled ("as the bird flies"): 196 Km. So the average speed is roughly 196 Km.
The best day to arrive at Koh Samui is Friday and it would be best to avoid Monday, as prices are on average 38.64% higher than on Friday. (Average prices, based on 13012 datapoints.)
We have a lot more statistics for flights PG 1403 and between Koh Samui and Phuket.