Fort Worth-based American on Monday cited uncertainty over the economy and high fuel costs.
The flight schedule change will reduce the airline's mainline capacity in the fourth quarter by about 3 percent -- compared to a year earlier. The anticipation of pilot retirements in the fourth quarter also was a factor in the schedule change.
American in July ordered 460 fuel-efficient jets Airbus and Boeing. The carrier anticipates receiving the new Airbus and Boeing jets in 2013.