The calculated distance (air line) between Novomyrhorod and Zvenihorodka is approximately 36 miles respectively 58 kilometers.
By car or train, the actual journey to Zvenihorodka is certainly longer, as only the direct route (as the crow flies) between Novomyrhorod and Zvenihorodka has been calculated here.
Air line (approximately)
58 kilometers
31 nautical miles