The best month to fly between Banjarmasin and Surabaya is May and the most expensive month to fly is April. (Average prices, based on 1541 datapoints.)
The best day to arrive at Banjarmasin is Tuesday and it would be best to avoid Friday, as prices are on average 8.6% higher than on Tuesday. (Average prices, based on 66134888 datapoints.)
The best time to fly is at around 16. (Average prices, based on 21543 datapoints.)