Metro M4 gets you from SAW to Kadıköy in about 50 minutes
The M4 Kadıköy–Sabiha Gökçen metro line runs directly to Terminal T at Istanbul Sabiha Gökçen International Airport, so you can walk from arrivals to the station without leaving the building. Trains go between SAW and Kadıköy on the Asian side, connecting you into the wider Istanbul metro network via several transfer points.
The line operates every day with typical metro-style frequency, often around every 5–10 minutes in busier daytime periods, so you rarely wait long on the platform. Because the M4 is a standard city metro, you use the same Istanbulkart or contactless payment you’d use on trams and buses in the city.
From the airport to Kadıköy, travel time usually sits around 45–55 minutes, depending on the time of day and train pattern. That makes the M4 competitive with taxis on most days, especially when E-5 and TEM traffic between SAW and the city center backs up for more than an hour.
Fares follow normal Istanbul metro pricing, with a single ride on M4 counting as one segment on your Istanbulkart balance. If you transfer to another metro or tram line within the standard transfer window, you pay the usual reduced transfer fare rather than a full second ticket.
The M4 stop at Sabiha Gökçen sits under Terminal T, signed clearly in the arrivals hall with “Metro / M4 Kadıköy” icons. Elevators and escalators connect the terminal level and the ticket hall, which helps if you’re moving a checked suitcase from baggage carousel to platform.
From Kadıköy station at the western end of M4, you can walk about 5–10 minutes to the ferry piers that connect to Karaköy and Eminönü, or switch to buses that fan out through Kadıköy and Üsküdar districts. This makes the M4 a solid backbone if you’re staying on Istanbul’s Asian side.
One practical tip: buy or top up an Istanbulkart before the evening peak, since lines at the airport and major transfer stations get longer after 17:00 on weekdays.