Distance between Sofia, Bulgaria and Portland, Texas, USA
10109 km = 6281 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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Sofia, Bulgaria
Country: BulgariaSofia’s coordinates: 42°41′51″ N, 23°19′26″ E
Population: 1,152,556
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Portland, USA
Country: USAState: Texas
Portland’s coordinates: 27°52′38″ N, 97°19′25″ W
Population: 15,099
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Wikipedia article: Portland
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