The flight between Rayong (UTP) and Ko Samui (USM) typically takes about 1 hour and 10 minutes.
There are 7 direct flights between Rayong and Ko Samui every week.
The flight numbers are PG294 and PG402.
From Rayong you will fly out from U Taphao International (UTP) and you will be landing at Samui (USM).
ATR 72/42 flies this route operated by Bangkok Airways.
Bangkok Airways have non-stop flights to Ko Samui.