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 650070 datapoints.)
MondayRp. 1.430.235
Mon
TuesdayRp. 1.499.456
Tue
WednesdayRp. 1.109.865
Wed
ThursdayRp. 1.391.626
Thu
FridayRp. 1.251.386
Fri
SaturdayRp. 1.272.539
Sat
SundayRp. 2.234.181
Sun
Analyse direct flights between Surabaya and Penang.