Bandera State Airport (FAA LID: 4W0) is a public use airport located in Bandera, Washington, King County, Washington, United States. It is owned by the Washington State DOT Aviation Division. This airport was constructed in 1948 as one of the first state airports. It is located in the upper Snoqualmie Valley, 14 miles (23 km) east of North Bend, Washington. The airport is a few feet off Interstate 90. It is an excellent location for mountain flying practice. Though surrounded by mountains, the valley is wide enough for maneuvering most light aircraft. The airport is frequently used by instructors for training students in soft field work and in mountain flying. Glider clubs frequently base out of Bandera.