Flight Changi Airport departs from Singapore Changi Airport at 01:10 and arrives at London Heathrow Airport at 07:45.
The flighttime is about 13h 35m. The distance travelled ("as the bird flies"): 11049 Km. So the average speed is roughly 813 Km.
There is an 7 hour time difference between Singapore and London
The best day to arrive at Singapore is Tuesday and it would be best to avoid Monday, as prices are on average 82.73% higher than on Tuesday. (Average prices, based on 164808 datapoints.)
We have a lot more statistics for flights SQ 306 and between Singapore and London.