The calculated distance (air line) between Saarijärvi and Jyväskylä is approximately 35 miles respectively 57 kilometers.
By car or train, the actual journey to Jyväskylä is certainly longer, as only the direct route (as the crow flies) between Saarijärvi and Jyväskylä has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles