Worldspan was formed in early 1990 by Delta Air Lines, Northwest Airlines, and TWA to operate and sell its GDS services to travel agencies worldwide. Worldspan operated very effectively and profitably, successfully expanding its business in markets throughout North America, South America, Europe, and Asia. As a result, in mid-2003, Worldspan was sold by its owner airlines to Citigroup Venture Capital and Ontario Teachers' Pension Fund[3] which in turn sold the business to Travelport in 2007.