The calculated distance (air line) between Nurmijärvi and Seinäjoki is approximately 174 miles respectively 279 kilometers.
By car or train, the actual journey to Seinäjoki is certainly longer, as only the direct route (as the crow flies) between Nurmijärvi and Seinäjoki has been calculated here.
Air line (approximately)
279 kilometers
151 nautical miles