Distance between Oslo, Norway and Rockford, Illinois, USA
6541 km = 4065 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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Oslo, Norway
Country: NorwayOslo’s coordinates: 59°54′45″ N, 10°44′45″ E
Population: 580,000
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Wikipedia article: Oslo
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Rockford, USA
Country: USAState: Illinois
Rockford’s coordinates: 42°16′16″ N, 89°05′38″ W
Population: 152,871
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Wikipedia article: Rockford
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