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This airline is based in Seattle, and
together with its sister carrier, Alaska Airlines, serves more than 80 cities in Alaska, the Lower 48, Canada and Mexico. Every Horizon flight earns
points in the Alaska Airlines Mileage Plan.
Address: Corporate Headquarters, PO Box 68977 Seattle WA USA 98168-0977
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After many years as the USA's largest domestic carrier, United is now also a major world airline serving cities nationwide and throughout the globe, in conjunction with its partners in the world 'Star Alliance' of international airlines. United Mileage Plus awards are accrued on every United flight.
Address: World Corporate Headquarters Chicago IL 60666
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