Schonefeld is the former East Berlin airport, and is located about 20km from the city center. This airport hosts many lowcost airlines such as Easyjet, Ryanair and Germanwings. To arrive there, hop on the S-bahn line 9 that is direct from Alexanderplatz to the airport. When we had to work, we took a free shuttle bus to another stop of the S-Bahn 9. The airport is located in Area C of travel, so you have to buy a special ticket, a single ticket costing 2.80 euros. If you want a ticket that includes travel within Berlin for the day, the price is 5.60 euros. The inside of the airport is pretty basic, at least security is quick, and there are some shops.