The calculated distance (air line) between Eskişehir and Büyükçekmece is approximately 133 miles respectively 214 kilometers.
By car or train, the actual journey to Büyükçekmece is certainly longer, as only the direct route (as the crow flies) between Eskişehir and Büyükçekmece has been calculated here.
Air line (approximately)
214 kilometers
116 nautical miles