The best day to arrive at Surabaya is Wednesday and it would be best to avoid Sunday, as prices are on average 101.3% higher than on Wednesday. (Average prices, based on 649724 datapoints.)
MondayNZD 149
Mon
TuesdayNZD 156
Tue
WednesdayNZD 116
Wed
ThursdayNZD 145
Thu
FridayNZD 130
Fri
SaturdayNZD 133
Sat
SundayNZD 233
Sun
Analyse direct flights between Surabaya and Penang.