Distance between Patna, India and Chicago, Illinois, USA
12493 km = 7763 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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Patna, India
Country: IndiaPatna’s coordinates: 25°35′38″ N, 85°08′08″ E
Population: 1,599,920
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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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