Delta today reported continued industry leading operational performance for April 2016, amidst a decline in unit revenues.  

Consolidated PRASM (passenger revenue per available seat-mile) for April dipped 4 percent during the month, according to Delta's press release. The airline said the decline is consistent with recent trends of pressure from close-in domestic yields and foreign exchange.

Mainline completion factor - the percentage of flights that were not canceled - came in at 99.9 percent for the month, with preliminary data showing 90.3 percent of those flights arriving on time in April.