The calculated distance (air line) between Dobříš and Jablonec nad Nisou is approximately 79 miles respectively 127 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 Dobříš and Jablonec nad Nisou has been calculated here.
Air line (approximately)
127 kilometers
68 nautical miles