The calculated distance (air line) between Silivri and Merter Keresteciler is approximately 34 miles respectively 54 kilometers.
By car or train, the actual journey to Merter Keresteciler is certainly longer, as only the direct route (as the crow flies) between Silivri and Merter Keresteciler has been calculated here.
Air line (approximately)
54 kilometers
29 nautical miles