Distance between Lisbon, Portugal and Concord, California, USA
9087 km = 5646 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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Lisbon, Portugal
Country: PortugalLisbon’s coordinates: 38°43′00″ N, 9°07′59″ W
Population: 517,802
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Wikipedia article: Lisbon
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Concord, USA
Country: USAState: California
Concord’s coordinates: 37°58′40″ N, 122°01′51″ W
Population: 122,067
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Wikipedia article: Concord
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