Distance between Riyadh, Saudi Arabia and Boulder, Colorado, USA

12271 km = 7625 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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Boulder, USA

Country: USA
State: Colorado
Boulder’s coordinates: 40°00′53″ N, 105°16′13″ W
Population: 97,385
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Wikipedia article: Boulder

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