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 1264969 datapoints.)
Mon
MondayPHP 4.812
Tue
TuesdayPHP 5.280
Wed
WednesdayPHP 3.881
Thu
ThursdayPHP 5.005
Fri
FridayPHP 4.375
Sat
SaturdayPHP 4.440
Sun
SundayPHP 7.812
Analyse direct flights between Surabaya and Penang.
