Metro İstanbul
Metro İstanbul, the municipal rail operator of the Istanbul Metropolitan Municipality, runs the M4 metro line that ends at Sabiha Gökçen Airport. Passengers pay with the city's Istanbulkart network fares, and the line links the airport with Kadıköy and the Asian side's suburbs, with interchanges to Marmaray and other city rail lines.
Routes (1)
M4 Kadıköy - Sabiha Gökçen Havalimanı
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Metro line running from Kadıköy on the Asian shore through Kozyatağı, Maltepe, Kartal and Pendik to its terminus at Sabiha Gökçen Airport. It connects to Marmaray at Ayrılık Çeşmesi and serves the city's integrated Istanbulkart fare network.