The best month to fly between Surabaya and Banjarmasin is March and the most expensive month to fly is April. (Average prices, based on 765 datapoints.)
The best day to arrive at Surabaya is Thursday and it would be best to avoid Saturday, as prices are on average 10.7% higher than on Thursday. (Average prices, based on 62198628 datapoints.)
The best time to fly is at around 15. (Average prices, based on 20769 datapoints.)