Passenger traffic dips at Sea-Tac

Passenger traffic through Seattle-Tacoma International Airport fell less than 1 percent during the first six months of 2010 compared with a similar period last year.

Freight was up nearly 4 percent.

The busiest airline at the airport continues to be SeaTac-based Alaska Airlines. That airline carried close to 36 percent of the airport’s passengers through June. Alaska’s sister airline, Horizon Air, was the airport’s second busiest with almost 15 percent of total passengers.