Head southwest on Sabiha Gökçen Havaalanı. Use the right lane to take the ramp to Pendik/D100/O-4/Ankara/E80/İstanbul. Continue onto Havaalanı Kavşağı and keep left at the fork, follow signs for İstanbul/Edirne and merge onto E80. Follow E80 to Fatih Cd. in İstanbul. Take the exit toward Halkalı from Atatürk Blv. Take the exit toward Halkalı and continue onto Fatih Cd. Courtyard Marriott Istanbul is on your right side.