The calculated distance (air line) between Üsküdar and Beylikdüzü is approximately 20 miles respectively 32 kilometers.
By car or train, the actual journey to Beylikdüzü is certainly longer, as only the direct route (as the crow flies) between Üsküdar and Beylikdüzü has been calculated here.
Air line (approximately)
32 kilometers
17 nautical miles