The calculated distance (air line) between Marmara Ereğlisi and Çatalca is approximately 29 miles respectively 47 kilometers.
By car or train, the actual journey to Çatalca is certainly longer, as only the direct route (as the crow flies) between Marmara Ereğlisi and Çatalca has been calculated here.
Air line (approximately)
47 kilometers
25 nautical miles