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 12992 datapoints.)
MondayNZD 348
Mon
TuesdayNZD 183
Tue
WednesdayNZD 183
Wed
ThursdayNZD 177
Thu
FridayNZD 174
Fri
SaturdayNZD 179
Sat
SundayNZD 216
Sun
Analyse direct flights between Koh Samui and Phuket.
NZD
