The calculated distance (air line) between Rustāq and Mazār-e Sharīf is approximately 153 miles respectively 246 kilometers.
By car or train, the actual journey to Mazār-e Sharīf is certainly longer, as only the direct route (as the crow flies) between Rustāq and Mazār-e Sharīf has been calculated here.
Air line (approximately)
246 kilometers
133 nautical miles