The calculated distance (air line) between An Nāşirīyah and Misratah is approximately 131 miles respectively 210 kilometers.
By car or train, the actual journey to Misratah is certainly longer, as only the direct route (as the crow flies) between An Nāşirīyah and Misratah has been calculated here.
Air line (approximately)
210 kilometers
113 nautical miles