Alaska Air Group, Inc. has reported December operational results for its subsidiaries, Alaska Airlines (Alaska) and Horizon Air (Horizon).

Alaska reported a 13.3 percent increase in traffic on a 10.7 percent increase in capacity, resulting in a 2.0-point increase in load factor to 85.6 percent. Alaska also reported that 80.9 percent of its flights arrived on time in December 2010, a 3.1-point decrease compared to the 84.0 percent reported in December 2009.

Horizon reported a 2.4 percent decline in traffic on a 5.8 percent decline in capacity compared to December 2009, resulting in a 2.7-point increase in load factor to 78.6 percent. Horizon also reported that 67.6 percent of its flights arrived on time in December 2010, a 13.1-point decrease compared to the 80.7 percent reported in December 2009.

Alaska Airlines and Horizon Air, subsidiaries of Alaska Air Group, together serve more than 90 cities through an expansive network in Alaska, the Lower 48, Hawaii, Canada and Mexico. Alaska Airlines ranked “Highest in Customer Satisfaction Among Traditional Network Carriers” in the J.D. Power and Associates 2008, 2009 and 2010 North America Airline Satisfaction Studies(SM). For reservations, visit alaskaair.com. For more news and information, visit the Alaska Airlines/Horizon Air Newsroom at alaskaair.com/newsroom.