Flight Changi Airport departs from Singapore Changi Airport at 12:40 and arrives at Kunming Wujiaba International Airport at 17:05.
The flighttime is about 4h 25m. The distance travelled ("as the bird flies"): 618 Km. So the average speed is roughly 140 Km.
The best day to arrive at Singapore is Saturday and it would be best to avoid Sunday, as prices are on average 59.19% higher than on Saturday. (Average prices, based on 2956 datapoints.)
We have a lot more statistics for flights MU 5082 and between Singapore and Kunming.