The calculated distance (air line) between Rejon placu Grunwaldzkiego and Opole is approximately 49 miles respectively 78 kilometers.
By car or train, the actual journey to Opole is certainly longer, as only the direct route (as the crow flies) between Rejon placu Grunwaldzkiego and Opole has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles