Alaska Airlines Expands Paine Field Network with 50% Seat Growth — Alaska Airlines, Inc.

Event summary

Alaska Airlines will increase seats at Seattle/Everett (Paine Field) by 50% starting Fall 2026 through summer 2027.
New nonstop service to San Jose, Calif., will begin in Spring 2027, operating twice daily on Horizon Air.
Los Angeles service will grow to twice-daily flights on larger Boeing 737 aircraft.
Portland service will expand to two daily flights, with additional capacity in San Diego and San Francisco.

The big picture

This expansion strengthens Alaska's dominance in the West Coast market, complementing its Seattle hub with more regional access points. The move reflects broader industry trends of airlines optimizing secondary airports to reduce congestion and improve regional connectivity. With Paine Field's growing role, Alaska is positioning itself to capture more of the Puget Sound travel market, particularly from business and leisure travelers seeking convenience.

What we're watching

Demand Validation: Whether the 50% seat growth at Paine Field will be met with commensurate passenger demand, particularly for new routes like San Jose.
Competitive Response: How rival airlines may react to Alaska's expanded presence in the Seattle-area market, particularly at Paine Field.
Operational Efficiency: The pace at which Alaska can integrate these expansions while maintaining service quality at its primary Seattle hub.