Distance between Philadelphia, Pennsylvania, USA and Longmont, Colorado, USA
2539 km = 1577 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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Philadelphia, USA
Country: USAState: Pennsylvania
Philadelphia’s coordinates: 39°57′08″ N, 75°09′49″ W
Population: 1,526,006
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Longmont, USA
Country: USAState: Colorado
Longmont’s coordinates: 40°10′01″ N, 105°06′06″ W
Population: 86,270
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Wikipedia article: Longmont
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