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

destinations in 58 countries. The carrier

is especially strong in the eastern United

States and on trans-Atlantic routes.

NORTHWEST AIRLINES Headquarters Eagan, Minnesota Hubs Detroit, Minneapolis/St. Paul,

Memphis Passenger traffic 78 billion RPMs Revenue $12.5 billion Operating profit $1.1 billion Net income $2.1 billion Employees 31,000 Fleet 515 aircraft, including Boeing 747s,

and 757s, McDonnell-Douglas DC-9s and

Airbus A330s, A320s, A319s. Major alliances SkyTeam, which includes Delta,