The best day to arrive at Koh Samui is Friday and it would be best to avoid Monday, as prices are on average 99.52% higher than on Friday. (Average prices, based on 12702 datapoints.)
MondayTHB 7.852
Mon
TuesdayTHB 4.135
Tue
WednesdayTHB 4.127
Wed
ThursdayTHB 3.987
Thu
FridayTHB 3.935
Fri
SaturdayTHB 4.035
Sat
SundayTHB 4.876
Sun
Analyse direct flights between Koh Samui and Phuket.