The new U.S. destinations are: Albuquerque, N.M.; Boise, Idaho; El Paso, Texas; Houston; Oklahoma City; Phoenix; Salt Lake City; Sacramento, Calif.; and Tucson, Ariz.
American also is adding more daily flights between LAX and Dallas, Miami, Chicago, Las Vegas and Orlando, Fla.
American Eagle is expanding its terminal at LAX to add four more gates at a cost of about $20 million. Construction is expected to be completed by the end of 2011, giving American Eagle 10 gates at LAX.
The company said that the Los Angeles expansion is part of its "cornerstone" network strategy that focuses more flying to and from the markets of Chicago, Dallas-Fort Worth, Los Angeles, Miami and New York.