Ontario and Los Angeles entered into a joint powers agreement, making Ontario International Airport part of the Los Angeles regional airports system in 1967. In 1968 the airport saw its first scheduled jet flights. In 1969 Continental Airlines started 720B nonstops to Denver and Chicago; Air California started 737 flights to San Jose; Pacific Southwest Airlines started San Francisco flights; and Western began 737 nonstops to Sacramento and Salt Lake City. In 1970 United Airlines started a nonstop to Chicago and American started flights to Dallas (and Chicago, for a short time). In September 1986, Ontario hosted the Concorde supersonic airliner during a promotional round-the-world flight.