Distance is 18,708 kilometers or 11,624 miles or 10,101 nautical miles
The distance is the theoretical air distance (great circle distance). Flying between the two locations' airports can be longer or shorter, depending on airport location and actual route chosen.
The map is using a projection that makes land and oceans much wider near the south and north poles. The heading/course/bearing during a flight varies in most cases. Map based on image from NASA.
