The calculated distance (air line) between Uusikaupunki and Jyväskylä is approximately 173 miles respectively 279 kilometers.
By car or train, the actual journey to Jyväskylä is certainly longer, as only the direct route (as the crow flies) between Uusikaupunki and Jyväskylä has been calculated here.
Air line (approximately)
279 kilometers
151 nautical miles