The calculated distance (air line) between Lauttasaari and Jyväskylä is approximately 147 miles respectively 236 kilometers.
By car or train, the actual journey to Jyväskylä is certainly longer, as only the direct route (as the crow flies) between Lauttasaari and Jyväskylä has been calculated here.
Air line (approximately)
236 kilometers
127 nautical miles