The calculated distance (air line) between Sancaktepe and Başakşehir is approximately 23 miles respectively 37 kilometers.
By car or train, the actual journey to Başakşehir is certainly longer, as only the direct route (as the crow flies) between Sancaktepe and Başakşehir has been calculated here.
Air line (approximately)
37 kilometers
20 nautical miles