KLM Royal Dutch Airlines is the flag carrier airline of the Netherlands. KLM is headquartered in Amstelveen, with its hub at nearby Amsterdam Airport Schiphol. It is part of the Air France–KLM group, and a member of the SkyTeam airline alliance.
Founded in 1919, KLM is the oldest airline in the world still operating under its original name and had 35,488 employees and a fleet of 119 (excluding subsidiaries) as of 2015. KLM operates scheduled passenger and cargo services to 145 destinations.
Although formally founded in October 1919, the new airline did not really take off until May 1920, when a four-seater De Havilland DH.16 made the inaugural flight to London's now defunct Croydon Airport.
In 1924, KLM launched a service from Amsterdam to Batavia (as Jakarta was then known), the world's longest air route at the time.
In 1946, it became the first European airline to begin scheduled flights to New York, using DC-4 aircraft.
Throughout its nearly hundred years of existence, KLM's commitment to innovation has been constant.
This doesn't just apply to its fleet either. The airline has also proved pioneering with its use of social media, introducing the first social media-driven flight schedule.
According to wikipedia & edition.cnn.com