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The busiest airports for American, US Airways

The Associated Press

The merger of American Airlines and US Airways will create the world's largest airline, one with a strong presence along the East Coast as well as in Dallas, Chicago, Phoenix, Los Angeles and in London. Here is a look at what percent of the combined airline's capacity flows through its top 15 airports, according to airline consultancy Ionosphere Capital.

Dallas-Fort Worth: 12.3 percent

Miami: 8.5 percent

Charlotte: 6.5 percent

Chicago O'Hare: 6.3 percent

Philadelphia: 6.2 percent

Phoenix: 5.1 percent

Los Angles: 5 percent

New York JFK: 4.5 percent

London Heathrow: 2.3 percent

Washington National: 1.9 percent

San Francisco: 1.8 percent

Boston: 1.6 percent

New York LaGuardia: 1.5 percent

Las Vegas: 1.2 percent

Seattle: 0.9 percent