How many kilometers is it from Haikou to London, England?

Haikou is 9537 kilometers away from London, England, and can be measured by using the ranging function of Baidu map. Take Haikou City as one endpoint and London, England as the other endpoint. The distance between the two points is 9537 kilometers. There is a direct flight from Haikou to London, which takes about 20 hours. The specific location and flight route are as follows: