The calculated distance (air line) between Marmara Ereğlisi and Kumburgaz is approximately 28 miles respectively 44 kilometers.
By car or train, the actual journey to Kumburgaz is certainly longer, as only the direct route (as the crow flies) between Marmara Ereğlisi and Kumburgaz has been calculated here.
Air line (approximately)
44 kilometers
24 nautical miles