Distance between Sydney, Australia and Philadelphia, Pennsylvania, USA
15902 km = 9881 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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Sydney, Australia
Country: AustraliaSydney’s coordinates: 33°52′04″ S, 151°12′26″ E
Population: 4,627,345
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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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Wikipedia article: Philadelphia
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