Meet the newest mega-airline: The parent company of United Airlines has approved a merger with Continental, in a deal valued at over $3 billion, the airlines announced Monday. The deal would make the new airline, which will keep the United name and be based in Chicago, the world's largest. Continental's lead executive will be running the new mega-airline. With 21 percent of the domestic market, the merger will also put the airline ahead of Delta, which had become the top carrier after buying Northwest Airlines in 2008.
