Distance between Perth, Australia and St. Petersburg, Florida, USA
18191 km = 11303 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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Perth, Australia
Country: AustraliaPerth’s coordinates: 31°57′08″ S, 115°51′41″ E
Population: 1,896,548
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Wikipedia article: Perth
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St. Petersburg, USA
Country: USAState: Florida
St. Petersburg’s coordinates: 27°46′15″ N, 82°40′45″ W
Population: 244,769
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Wikipedia article: St. Petersburg
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