Distance between San Diego, California, USA and Rockford, Illinois, USA
2681 km = 1666 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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San Diego, USA
Country: USAState: California
San Diego’s coordinates: 32°42′55″ N, 117°09′26″ W
Population: 1,307,402
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Wikipedia article: San Diego
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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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