As you leave the airport, turn right at the first intersection and follow the signs to Sirkici. Turn left at the roundabout with the big fountain and drive along the seaside road for approximately 17 kilometers then turn left at Sultanahmet. At the first railway bridge, turn right and continue until you see the Sultanahmet Mosque. When you approach the T-junction, you will be on Utangac Street and the Four Seasons Hotel will be directly adjacent to you on Tevkifhane Street