The calculated distance (air line) between Vlašim and Jablonec nad Nisou is approximately 71 miles respectively 115 kilometers.
By car or train, the actual journey to Jablonec nad Nisou is certainly longer, as only the direct route (as the crow flies) between Vlašim and Jablonec nad Nisou has been calculated here.
Air line (approximately)
115 kilometers
62 nautical miles