The calculated distance (air line) between Jablonec nad Nisou and Chomutov is approximately 79 miles respectively 127 kilometers.
By car or train, the actual journey to Chomutov is certainly longer, as only the direct route (as the crow flies) between Jablonec nad Nisou and Chomutov has been calculated here.
Air line (approximately)
127 kilometers
69 nautical miles