Horizon Air is a regional airline headquartered in Seattle, Washington, operating as a subsidiary of Alaska Air Group. Founded in 1981, it primarily serves destinations across the western United States and Canada, functioning as a regional feeder carrier for Alaska Airlines under the Alaska Airlines brand. The airline operates under codeshare and capacity purchase agreements with Alaska Airlines, meaning most of its flights are marketed and ticketed as Alaska Airlines flights. Horizon Air has built a strong reputation for reliability and service quality in its regional markets. As a key part of the Alaska Air Group family, Horizon Air plays an essential role in connecting smaller communities to Alaska Airlines' broader network, particularly throughout the Pacific Northwest, California, and the Mountain West.