Distance between Chicago, Illinois, USA and Portsmouth, United Kingdom
6340 km = 3940 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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Chicago, USA
Country: USAState: Illinois
Chicago’s coordinates: 41°51′00″ N, 87°39′00″ W
Population: 2,695,598
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Wikipedia article: Chicago
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Portsmouth, United Kingdom
Country: United KingdomPortsmouth’s coordinates: 50°47′56″ N, 1°05′28″ W
Population: 194,150
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Wikipedia article: Portsmouth
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