The calculated distance (air line) between As Sulaymānīyah and Marīvān is approximately 42 miles respectively 68 kilometers.
By car or train, the actual journey to Marīvān is certainly longer, as only the direct route (as the crow flies) between As Sulaymānīyah and Marīvān has been calculated here.
Air line (approximately)
68 kilometers
37 nautical miles