Alaska Airlines is a Major american Airline Headquartered In SeaTac, Washington, at intervals The metropolis Metropolitan space Of The State Of Washington. it's The Fifth-Largest Airline within the u. s. once Measured By Fleet Size, scheduled Passengers Carried, And range Of Destinations Served. Alaska, in conjunction with Its Regional Partners, Operates an oversized Domestic Route Network, Primarily centered On Connecting From The State Of Alaska To Over 100 Destinations within the Contiguous u. s., Hawaii, Canada, Costa Rica, And Mexico. Alaska Airlines isn't A Member Of Any Of The 3 Major Airline Alliances. However, it's Codeshare Agreements With seventeen Airlines, as well as Member Airlines Of Oneworld, SkyTeam, Star Alliance, And independent Airlines. Regional Service Is Operated By Sister Airline Horizon Air And freelance Carrier SkyWest Airlines. https://reservationsnumber.org/alaska-airlines/about/