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Horizon Air

Horizon Air (QX) is a U.S. regional airline in Alaska Air Group, based in SeaTac, Washington. It operates regional flights for Alaska Airlines, with Seattle-Tacoma and Portland central to its network. For travelers, Horizon is best understood as the regional operating carrier behind many Alaska-branded Embraer 175 flights: schedules, sales and mileage questions generally sit in the Alaska Airlines / Atmos Rewards ecosystem. Alaska Airlines is a oneworld member; Horizon is not presented as a separate oneworld member, so travelers should check the marketing carrier, fare rules and Atmos/oneworld pages when choosing where to credit a flight.