The calculated distance (air line) between Marmara Ereğlisi and Boyalık is approximately 41 miles respectively 65 kilometers.
By car or train, the actual journey to Boyalık is certainly longer, as only the direct route (as the crow flies) between Marmara Ereğlisi and Boyalık has been calculated here.
Air line (approximately)
65 kilometers
35 nautical miles