Northwest Airlines

In 2008 Northwest Airlines announced that it was to merge with Delta Air Lines, and over the next couple of years the carriers started to merge their operations - consolidating gates and check-in counters at airports around the world. In spring 2009, Northwest's hubs at Detroit, Minneapolis/St. Paul, and Memphis were rebranded and at the end of that year its operations centre was transferred to Delta's head offices at Atlanta, Georgia.

The single operating certificate was granted by the Federal Aviation Administration at the end of 2009 and their reservations systems were merged in January 2010.

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