Boeing Field King County International Airport

Boeing Field / King County International Airport (KBFI) sits 5 miles south of downtown Seattle on the Duwamish River. It is the dedicated business-aviation and general-aviation airport for the Seattle metro and a substantial Boeing manufacturing and test-flight hub — Boeing 737s built at the Renton plant are flown to KBFI for delivery and the field hosts substantial Boeing flight-test operations. The primary runway 14R/32L is 10,003 feet and runway 14L/32R is 3,710 feet. Heavy and ultra-long-range jets operate routinely from KBFI; the long runway plus modest elevation means transatlantic and transpacific departures at MTOW are well within performance. Three FBOs (Signature, Modern Aviation, and Galvin Flying) handle the ramp with substantial hangar capacity. Field elevation is 21 feet, no density-altitude concerns. The dominant operational considerations are Pacific Northwest weather (low ceilings, frequent precipitation), the proximity to KSEA class B airspace that shapes departure and arrival routings, and the Boeing flight-test traffic that occasionally constrains ramp access. KBFI is the practical Seattle answer for charter brokers: ground time to downtown Seattle is 10–15 minutes, Bellevue and the Microsoft campus are 25–35, and the Eastside tech corridor is 30–40 minutes via I-90 and I-405.