DELTA NEWS ON THE GO. Subscribe and follow.

Delta today reported a decline in unit revenues for September, amid strong operating performance and lower fall capacity levels.

Consolidated PRASM (passenger revenue per available seat-mile) was down 3 percent for the month year over year, according to Delta's press release. The airline attributed the dip to a continued supply-demand imbalance in the trans-Atlantic and headwinds from prior year Yen hedge gains in September. The airline said pressures from close-in domestic yields moderated slightly in September with the implementation of its fall schedule.

Mainline completion factor - the percentage of flights that were not canceled - came in at 99.9 percent for the month, with preliminary data showing 90.2 percent of those flights arrived on time in September.