The best day to arrive at Surabaya is Wednesday and it would be best to avoid Sunday, as prices are on average 94.91% higher than on Wednesday. (Average prices, based on 644534 datapoints.)
MondayUS $ 97
Mon
TuesdayUS $ 118
Tue
WednesdayUS $ 73
Wed
ThursdayUS $ 93
Thu
FridayUS $ 124
Fri
SaturdayUS $ 87
Sat
SundayUS $ 143
Sun
Analyse direct flights between Surabaya and Penang.