The calculated distance (air line) between Bāmyān and Mehtar Lām is approximately 136 miles respectively 218 kilometers.
By car or train, the actual journey to Mehtar Lām is certainly longer, as only the direct route (as the crow flies) between Bāmyān and Mehtar Lām has been calculated here.
Air line (approximately)
218 kilometers
118 nautical miles