Distance between Colombo, Sri Lanka and Dunhua, China

6212 km = 3860 miles

We assume a spherical Earth as a close approximation of the true shape of the Earth (an oblate spheroid). The distance is calculated as great-circle or orthodromic distance between city centres on the surface of a sphere.

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Colombo, Sri Lanka

Country: Sri Lanka
Colombo’s coordinates: 6°55′54″ N, 79°50′52″ E
Population: 648,034
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Wikipedia article: Colombo

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Dunhua, China

Country: China
Dunhua’s coordinates: 43°22′21″ N, 128°14′33″ E
Population: 148,844
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Wikipedia article: Dunhua

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