Polish airline Enter Air (E4) operates from bases at Warsaw Frédéric Chopin Airport (WAW), Katowice International Airport (KTW), Poznań-Ławica Airport (POZ) and Wrocław–Copernicus Airport (WRO). It operates scheduled passenger and charter flights to 74 holiday destinations. These include 10 domestic destinations, 10 airports in Greece, six airports in Spain and six airports in the United Kingdom. In total, the airline flies to about 25 countries in Europe, Africa, the Middle East and Asia. Enter Air's fleet of planes includes Boeing 737-400 and Boeing 737-800 aircraft.