Flight Changi Airport departs from Singapore Changi Airport at 18:05 and arrives at Surabaya Juanda International Airport at 19:30.
The flighttime is about 2h 25m. The distance travelled ("as the bird flies"): 1022 Km. So the average speed is roughly 423 Km.
There is an 1 hour time difference between Singapore and Surabaya
The best month to arrive at Singapore is August and the most expensive month to fly is April. (Average prices, based on 5146 datapoints.)
We have a lot more statistics for flights 3K 1249 and between Singapore and Surabaya.