Northwest Airlines KLM

Delta Air Lines is the world's biggest airline. From its hubs in Atlanta, Cincinnati, Detroit, Memphis, Minneapolis-St. Paul, New York-JFK, Salt Lake City, Amsterdam and Tokyo-Narita, Delta, its Northwest subsidiary and Delta Connection carriers provide service to 368 destinations in 66 countries and serve more than 170 million passengers each year. Delta's marketing alliances allow clients to gain and redeem either SkyMiles or WorldPerks on more than 16, 000 daily flights provided by SkyTeam and other partners.