Horizon AirlinesHZA/ BN

Horizon Airlines was a regional carrier based in Seattle, Washington, that operated from 1981 until its merger with Alaska Airlines in 2011. The airline focused on short- to medium-haul regional service throughout the Pacific Northwest and California, feeding passengers to Alaska Airlines' larger hub at Seattle-Tacoma International Airport. As a regional affiliate, Horizon operated under Alaska Airlines' codeshare agreements and frequent flyer program, Alaska Mileage Plan, providing essential connectivity for the broader network. The airline offered single-class service on regional turboprop and regional jet aircraft, prioritizing efficiency and reliability on its regional routes. Horizon's integration into Alaska Airlines marked the end of an independent regional operation that had served communities across the western United States for three decades.