United Continental Holdings, Inc. has reported December 2011 operational results for its United Airlines and Continental Airlines units. 

United and Continental's combined consolidated traffic (revenue passenger miles) in December 2011 decreased 0.7 percent versus December 2010 results on a combined consolidated capacity (available seat miles) decrease of 0.1 percent. The carriers' combined consolidated load factor in December 2011 decreased 0.5 points compared to the same period in 2010.

United and Continental's December 2011 combined consolidated and mainline passenger revenue per available seat mile (PRASM) increased an estimated 4.0 to 5.0 percent and 3.5 to 4.5 percent, respectively, as compared to December 2010.