Sabiha Gökçen International Airport is the second of Istanbul’s international airports and it is as a hub for low-cost Turkish airline, Pegasus Airlines, as well as serving a number of charter and international airlines flying from many different cities across Europe. The airport was named after the first female combat pilot in Turkey, Sabiha Gökçen, and it is located on the Asian side of Istanbul, about 35 kilometres (22 miles) southeast of the centre of the city. A second airport was needed to handle the growing volume of air traffic coming to Istanbul, and since opening, has added a new terminal building. Sabiha Gökçen International Airport is most easily reached by car but there are a number of transport options to take you from the airport by bus which link with the Istanbul Metro system for journeys into the city centre.