Distance between Udon Thani, Thailand and Colombo, Sri Lanka
2751 km = 1709 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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Udon Thani, Thailand
Country: ThailandUdon Thani’s coordinates: 17°24′56″ N, 102°47′09″ E
Population: 247,231
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Colombo, Sri Lanka
Country: Sri LankaColombo’s coordinates: 6°55′54″ N, 79°50′52″ E
Population: 648,034
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