Washington flying changes quickly across short distances. Around Puget Sound, low-elevation airports sit close to complex traffic flows, water. frequent IFR weather. KBFI (Boeing Fld/King County Intl) is only 22 ft above sea level, has a 10,007 ft runway. supports serious GA, charter. training activity with 3 FBOs. The state also has big-runway inland capability. KMWH (Grant County Intl) in Moses Lake has the longest listed runway in Washington at 13,503 ft and 7 total runways. KGEG (Spokane Intl) adds an 11,002 ft runway, ILS, tower services. 2 FBOs at 2,385 ft elevation. Those numbers matter on hot eastern Washington days. For IFR planning, Washington is well served at the larger fields. The data lists 19 public-use airports with ILS. Towered ILS options include KSEA (Seattle-Tacoma Intl), KPAE (Seattle Paine Fld Intl), KPSC (Tri-Cities), KYKM (Yakima Air Trml/McAllister Fld), KBLI (Bellingham Intl), KOLM (Olympia Rgnl). KTIW (Tacoma Narrows). Outside that network, most airports are non-towered, so check services and airport notes before departure.