6568 miles, 5708 nautical miles.
Air distance and flight time from China to Tonga (the geographical center of the two countries):
Flight speed: 700 km/h, time required: 15 hours and 6 minutes.
Flight speed: 500 km/h, time required:? 2 1 hour 8 minutes.
Sunrise, sunset and local date in China and Tonga:
When traveling from China to Tonga, please pay attention to the differences of sunrise, sunset time and local date. Sunrise and sunset times and local dates in China and Tonga are calculated by using the data of geographical centers of the two countries.
Sunrise time:
China 07:02, Tonga? 06:46。
Sunset time:
China 7: 18, Tonga? 6:48。