Distance between Calgary, Canada and O'Fallon, Missouri, USA
2275 km = 1414 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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Calgary, Canada
Country: CanadaCalgary’s coordinates: 51°03′00″ N, 114°05′07″ W
Population: 1,019,942
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Wikipedia article: Calgary
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O'Fallon, USA
Country: USAState: Missouri
O'Fallon’s coordinates: 38°48′38″ N, 90°41′59″ W
Population: 79,329
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Wikipedia article: O'Fallon
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