The calculated distance (air line) between Qaryat ‘Umar al Mukhtār and Tobruk is approximately 138 miles respectively 222 kilometers.
By car or train, the actual journey to Tobruk is certainly longer, as only the direct route (as the crow flies) between Qaryat ‘Umar al Mukhtār and Tobruk has been calculated here.
Air line (approximately)
222 kilometers
120 nautical miles