Domestic U.S. airline passenger yield in September declined by 16.7 percent

year over year to 13.26 cents per mile, the largest monthly decline since June, according to the Air Transport Association. Defined as the "average price someone pays to fly one mile excluding government taxes and fees," domestic yield has now declined for 11 consecutive months. Yields for transatlantic, transpacific and Latin America routes each were down about 20 percent. "The demand for air travel remains weak, as evidenced by the untenable pricing environment," according to ATA, which also reported a 2 percent drop in the number of passengers flying on U.S. carriers during September, a narrower year-over-year decline than the 5 percent reduction measured in August.