Distance between Sums'ka and Pervomaisk is 426.96 km.
This distance is equal to 265.3 miles, and 230.39 nautical miles.
The distance line on map shows distance from Sums'ka to Pervomaisk between two cities.
If you travel with an airplane (which has average speed of 560 miles) between Sums'ka to Pervomaisk,
It takes 0.47 hours to arrive.