OREANDA-NEWS. January 12, 2016. Delta today reported that its consolidated passenger unit revenue for December declined 5 percent compared to December 2014. Two percentage points of the decline were attributed to the calendar timing of Thanksgiving, which pushed more holiday travel into November. An additional 2 points was due to international currency fluctuations, according to the report.

In a related investor update, the airline said that its operating margin for the final quarter of 2015 will be 16.5 percent to 17.5 percent, and that unit revenues for the quarter will be down about 1.5 percent.

Delta’s mainline completion factor was 99.75 percent for the month, with an 83.6 percent on-time performance rate. The December peak holiday travel period included unusually difficult weather conditions across much of the domestic U.S.