Flight Changi Airport departs from Singapore Changi Airport at 12:10 and arrives at Surabaya Juanda International Airport at 13:40.
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 Tuesday and it would be best to avoid Sunday, as prices are on average 155.35% higher than on Tuesday. (Average prices, based on 9824745 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 824 datapoints.)
We have a lot more statistics for flights JQ 247 and between Singapore and Surabaya.