Flight Changi Airport departs from Singapore Changi Airport at 19:00 and arrives at Surabaya Juanda International Airport at 20:30.
The flighttime is about 2h 30m. The distance travelled ("as the bird flies"): 1022 Km. So the average speed is roughly 409 Km.
There is an 1 hour time difference between Singapore and Surabaya
The best day to arrive at Singapore is Monday and it would be best to avoid Wednesday, as prices are on average 37.42% higher than on Monday. (Average prices, based on 17781518 datapoints.)
We have a lot more statistics for flights KL 4057 and between Singapore and Surabaya.
