The calculated distance (air line) between Masjed Soleymān and Shūshtar is approximately 28 miles respectively 45 kilometers.
By car or train, the actual journey to Shūshtar is certainly longer, as only the direct route (as the crow flies) between Masjed Soleymān and Shūshtar has been calculated here.
Air line (approximately)
45 kilometers
24 nautical miles