Flight Changi Airport departs from Singapore Changi Airport at 21:50 and arrives at Chennai Chennai International Airport at 23:40.
The flighttime is about 4h 20m. The distance travelled ("as the bird flies"): 2634 Km. So the average speed is roughly 608 Km.
There is an 2.5 hour time difference between Singapore and Chennai
The best day to arrive at Singapore is Tuesday and it would be best to avoid Saturday, as prices are on average 65.96% higher than on Tuesday. (Average prices, based on 486499 datapoints.)
We have a lot more statistics for flights IX 687 and between Singapore and Chennai.