Distance between Colombo, Sri Lanka and Perth, Australia

5774 km = 3588 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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Perth, Australia

Country: Australia
Perth’s coordinates: 31°57′08″ S, 115°51′41″ E
Population: 1,896,548
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Wikipedia article: Perth

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