FORT WORTH, Texas (AP) — Passenger traffic on American Airlines and US Airways fell slightly last month, leaving a few more empty seats on planes, especially on flights between the U.S. and Europe.

American Airlines Group Inc. said Wednesday that it expects a key revenue figure to rise by between 0.5 percent and 1.5 percent for the third quarter, which ended Sept. 30. An increase in the statistic — revenue for every seat flown one mile — often indicates that passengers paid higher fares on average.