Flight Changi Airport departs from Singapore Changi Airport at 18:55 and arrives at Surabaya Juanda International Airport at 20:25.
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 Friday and it would be best to avoid Thursday, as prices are on average 111.54% higher than on Friday. (Average prices, based on 9832931 datapoints.)
We have a lot more statistics for flights SQ 5555 and between Singapore and Surabaya.