Kirazlı ↔ Metrokent–Olimpiyat 2013[31] 15.9 km[31] 11[31] A southern extension (9.0 km to Bakırköy, with 7 stations) is under construction. Operates from 06:00 a.m. to 00.00 a.m. Kadıköy ↔ Tavşantepe 2012[32] 26.5 km[32] 19[32] An extension 7.4 km to Sabiha Gökçen International Airport with 4 more stations is under construction.