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 661567 datapoints.)
MondayNZD 140
Mon
TuesdayNZD 153
Tue
WednesdayNZD 113
Wed
ThursdayNZD 142
Thu
FridayNZD 128
Fri
SaturdayNZD 130
Sat
SundayNZD 228
Sun
Analyse direct flights between Surabaya and Penang.