Flight Changi Airport departs from Singapore Changi Airport at 15:05 and arrives at Dubai International Airport at 18:45.
The flighttime is about 7h 40m. The distance travelled ("as the bird flies"): 5306 Km. So the average speed is roughly 692 Km.
There is an 4 hour time difference between Singapore and Dubai
The best day to arrive at Singapore is Thursday and it would be best to avoid Tuesday, as prices are on average 94.84% higher than on Thursday. (Average prices, based on 273635 datapoints.)
We have a lot more statistics for flights SQ 494 and between Singapore and Dubai.