Distance between Sofia, Bulgaria and Barnaul, Altai Krai, Russia
4507 km = 2801 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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Barnaul, Russia
Country: RussiaBarnaul’s coordinates: 53°21′38″ N, 83°45′48″ E
Population: 599,579
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Wikipedia article: Barnaul
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