There are two main airports serving Brussels: Brussels (BRU) and South Charleroi (CRL). Brussels Airport is one of the busiest in Europe and it serves millions of passengers every year. The airports host several major airlines, which operates both domestic and international flights to and from Brussels. However, South Charleroi Airport caters mostly to low-cost carriers including Ryanair and Wizz Air. There are basic facilities at the two airports including duty-free shops, ATMS and bureau de change services. There are several non-stop flights from Brussels to Berlin airports. There are also connecting flights via Amsterdam, Copenhagen, Frankfurt, Stuttgart and Zurich.