Southwest Washington Regional Airport — Kelso, United States

Southwest Washington Regional Airport serves Kelso and the surrounding Longview area in Washington State, along the Columbia and Cowlitz Rivers near the Oregon border. KLS primarily supports general aviation, including private aircraft, flight training, and business travel, rather than scheduled commercial airline service. The airport plays a role in the local economy tied to the timber and manufacturing industries historically prominent in the Longview-Kelso area, and it serves as a regional hub for recreational pilots given its proximity to the Pacific Northwest's scenic Columbia River Gorge and Cascade foothills. Emergency and medical flight operations also use the facility given its position between Portland and Seattle.