Distance between Riyadh, Saudi Arabia and Porto Velho, Brazil

12505 km = 7770 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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Riyadh, Saudi Arabia

Country: Saudi Arabia
Riyadh’s coordinates: 24°41′15″ N, 46°43′18″ E
Population: 4,205,961
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Wikipedia article: Riyadh

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Porto Velho, Brazil

Country: Brazil
Porto Velho’s coordinates: 8°45′42″ S, 63°54′14″ W
Population: 306,180
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Wikipedia article: Porto Velho

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