A record 207,188 passengers took Alaska Airlines' flights to and from Santa Rosa in 2011, according to Charles M. Schulz-Sonoma County Airport.
The previous record was 204,734 set in 2008. Alaska has five flights a day from Santa Rosa to Los Angeles, Seattle, Portland and Las Vegas.
Ridership grew almost 9.8 percent in 2011, the airport said. Travel was down in 2009 and 2010 because of the nation's economic downturn.
In December, 16,541 passengers took Alaska's Santa Rosa flights, up 1.2 percent from 2010. The flights averaged 74 percent full last month.
The flights are operated by Horizon Air, Alaska's sister carrier. Alaska handles scheduling, ticketing, pricing and marketing.
Both airlines are part of Seattle-based Alaska Air Group.
Alaska's Horizon-operated flights carried 2.6 percent fewer passengers system-wide in 2011 as the carrier trimmed the size of its fleet, according to Alaska Air Group.