Flight Changi Airport departs from Singapore Changi Airport at 23:30 and arrives at London Heathrow Airport at 05:55.
The flighttime is about 13h 25m. The distance travelled ("as the bird flies"): 11049 Km. So the average speed is roughly 824 Km.
There is an 7 hour time difference between Singapore and London
The best day to arrive at Singapore is Thursday and it would be best to avoid Saturday, as prices are on average 37.77% higher than on Thursday. (Average prices, based on 167068 datapoints.)
We have a lot more statistics for flights SQ 322 and between Singapore and London.