The calculated distance (air line) between Nurmijärvi and Jyväskylä is approximately 126 miles respectively 204 kilometers.
By car or train, the actual journey to Jyväskylä is certainly longer, as only the direct route (as the crow flies) between Nurmijärvi and Jyväskylä has been calculated here.
Air line (approximately)
204 kilometers
110 nautical miles