FACTBOX: How Delta and Northwest stack up

NEW YORK (Reuters) - A merger announced on Monday between Delta Air Lines Inc, the No. 3 U.S. carrier, and Northwest Airlines Corp, No. 5, would create the world's largest airline by traffic and could kick-start long-expected consolidation in the U.S. industry.

Following are key data for Delta and Northwest, for the full-year 2007.

DELTA AIR LINES Headquarters Atlanta Hubs Atlanta, Cincinnati, New York,

Salt Lake City Passenger traffic 122 billion RPMs Revenue $19.1 billion Operating profit $1.1 billion Net profit $1.6 billion Employees 55,044 Fleet 578 planes, including 90 CRJ-100

regional jets, 133 Boeing 757s and 117

MD-88s Major alliances SkyTeam, which includes Northwest and

Continental Airlines;

transatlantic joint venture with Air

France-KLM Reach Delta and Delta Connection flies to 306