CSA Czech Airlines (in Czech: České aerolinie (abbreviation: ČSA) is the Czech national airline company, and former national carrier of Czechoslovakia based at Ruzyně International Airport, Prague. It operates scheduled services to over 120 destinations in 52 countries, including most major European cities and to transit points in North America, Asia, the Middle East and North Africa It also operates charter and cargo services. In 2006 it carried over 5 and half million passengers. The airline runs a frequent flyer programme called the "OK Plus Frequent Flyer Programme". It is a member of the SkyTeam alliance.