Northwest Airlines, Inc. (often abbreviate NWA) is the principal subsidiary of Northwest Airlines Corporation (NYSE: NWA) and is a major United Statesairline headquartered in Eagan, Minnesota, near Minneapolis-St. Paul International Airport in the United States. Northwest has three major hubs in the United States: Detroit Metropolitan Wayne County Airport, Minneapolis-Saint Paul International Airport, and Memphis International Airport. Northwest also operates flights from a small hub in Asia at Narita International Airport near Tokyo and also operates transatlantic flights in cooperation with partner KLM from Schiphol Airport in Amsterdam. Additionally, it maintains focus city operations at Indianapolis International Airport, Honolulu International Airport, and Seattle-Tacoma International Airport.