The calculated distance (air line) between Orūmīyeh and Oshnavīyeh is approximately 35 miles respectively 57 kilometers.
By car or train, the actual journey to Oshnavīyeh is certainly longer, as only the direct route (as the crow flies) between Orūmīyeh and Oshnavīyeh has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles