SeaTac’s Alaska Airlines says its passenger traffic increased 9.4 percent last month

Alaska Airlines’ efforts to add new spokes to its route structure from its Seattle hub apparently are paying dividends for the SeaTac-based airline.

Alaska reported its passenger traffic grew by 9.4 percent last month compared with an 8.7 percent increase in its capacity. Those numbers mean that Alaska’s planes were operating closer to capacity in November than a year earlier. The airline said that it filled 82.3 percent of its seats with paying passengers in November this year compared with 81.7 percent in the same month of 2013.

Alaska is in a new competition with Delta Air Lines of Atlanta for domestic traffic to and from Sea-Tac. Delta has seen its share of the airport’s market rise to second place among the airlines serving Sea-Tac.

Alaska has countered Delta’s new flights by adding new flights from Sea-Tac to cities around the country including Albuquerque, New Orleans, Baltimore, Detroit, Tampa, Omaha and Colorado Springs.