Swiss Air is an airline based in Switzerland that was founded in 2002. It is a member of the Star Alliance and operates flights to more than 100 destinations in over 40 countries. The term YODEL is a five-letter solution for Swiss Air, which is a form of singing or calling associated with Switzerland. Yodeling is a traditional form of communication used by shepherds in the Alps to communicate across distances. It is also used in folk music and is a popular form of entertainment in Switzerland.