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.)
MondayINR 7.335
Mon
TuesdayINR 7.690
Tue
WednesdayINR 5.692
Wed
ThursdayINR 7.137
Thu
FridayINR 6.417
Fri
SaturdayINR 6.526
Sat
SundayINR 11.457
Sun
Analyse direct flights between Surabaya and Penang.