Distance between Ottawa, Canada and Boulder, Australia
17829 km = 11078 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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Ottawa, Canada
Country: CanadaOttawa’s coordinates: 45°24′40″ N, 75°41′53″ W
Population: 812,129
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Wikipedia article: Ottawa
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Boulder, Australia
Country: AustraliaBoulder’s coordinates: 30°46′55″ S, 121°29′28″ E
Population: 5,178
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Wikipedia article: Boulder
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