American Airlines, a unit of AMR Corp., said on Tuesday that its September traffic fell 1.4 percent from 10.74 billion revenue passengers miles last September, to 10.6 billion revenue passengers miles. Each revenue mile is one paying passenger flown one mile.

The Fort Worth-based airline said capacity dropped 0.5 percent to 14 billion available seat miles from 14.09 billion available seat miles in September 2005. Its load factor, or the percentage of seats filled, also decreased to 75.5 percent from 76.2 percent.

Meanwhile, AMR's other subsidiary, American Eagle Airlines said traffic rose 3.1 percent in September to 697.1 million passenger miles from 676.4 million passenger miles a year ago in September. Load factor rose to 69.7 percent from 69.2 percent a year ago.

American Airline’s carrier's capacity rose 2.4 percent to 1 billion available seat miles from 977.4 million available seat miles in September 2005.