The best day to arrive at Koh Samui is Monday and it would be best to avoid Sunday, as prices are on average 33.13% higher than on Monday. (Average prices, based on 12924 datapoints.)
MondayNZD 163
Mon
TuesdayNZD 184
Tue
WednesdayNZD 184
Wed
ThursdayNZD 178
Thu
FridayNZD 175
Fri
SaturdayNZD 180
Sat
SundayNZD 217
Sun
Analyse direct flights between Koh Samui and Phuket.