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 12614 datapoints.)
MondayTHB 5.468
Mon
TuesdayTHB 4.145
Tue
WednesdayTHB 4.136
Wed
ThursdayTHB 3.996
Thu
FridayTHB 3.944
Fri
SaturdayTHB 4.044
Sat
SundayTHB 4.887
Sun
Analyse direct flights between Koh Samui and Phuket.
THB
