regional airport The state government formed the Commercial Aviation Coordinating Commission (CACC) in 2019 to investigate sites for a new commercial airport that would serve the Puget Sound region and relieve pressure at Sea-Tac. The new airport would accommodate 20 million passengers annually by 2050 and have two runways. The plan assumes that Sea-Tac and Paine Field would be expanded to handle 67 million annual passengers, which would fall below the projected 94 million annual passengers using Seattle-area airports. In September 2022, the commission identified expansion of Paine Field or the construction of a new airport in southern Pierce County or northern Thurston County as potential options. The wider field of 10 candidates also included options in Kitsap, Skagit, and Snohomish counties. Opposition to the Pierce County and Thurston County sites formed following the September 2022 announcement, citing potential noise and traffic impacts. The CACC is planned to recommend a site to the state legislature by June 2023. See also Lake Washington steamboats and ferries Street layout of Seattle Bibliography References External links Getting Around Seattle from Seattle Department of Transportation Washington State Department of Transportation Seattle, Washington