The best month to fly between Surabaya and Banjarmasin is March and the most expensive month to fly is July. (Average prices, based on 1288 datapoints.)
The best day to arrive at Surabaya is Wednesday and it would be best to avoid Monday, as prices are on average 40.8% higher than on Wednesday. (Average prices, based on 60488419 datapoints.)
The best time to fly is at around 15. (Average prices, based on 21284 datapoints.)