Distance between Porto, Portugal and Chicago, Illinois, USA
6337 km = 3938 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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Porto, Portugal
Country: PortugalPorto’s coordinates: 41°08′58″ N, 8°36′39″ W
Population: 249,633
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Wikipedia article: Porto
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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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