From Sabiha Gökçen Airport Sabanci University is 15 minutes (10 km) away from Istanbul Sabiha Gökçen Airport (SAW). Only way to reach to the University from Sabiha Gökçen Airport is taking a cab (Appx. 45 TRY, 10 EUR)
From Kadiköy and 4 Levent
Sabanci University is 35 km away from Kadıköy (Center of the Anatolian Side), and 45 km away from 4 Levent (City Center). In this sense, taking a taxi is relatively expensive.
Sabanci University provides shuttle service from and to Kadiköy and 4 Levent. Please check this link for shuttle service hours. Under these links (Kadıköy, 4 Levent) you may also see the departing locations of the shuttle busses.