The flight distance from Boeing Field/King County International Airport (BFI) in Seattle, United States to Nuevo Aeropuerto Internacional Mariscal Sucre (UIO) in Quito, Ecuador is 6,785 kilometers (4,216 miles / 3,664 nautical miles). The estimated flight time for this route is approximately 9h, flying southeast at a heading of 128°.

This is a long-haul route typically operated by wide-body aircraft such as the Boeing 777 or Airbus A350. Full meal service, in-flight entertainment, and comfort amenities are standard.

This is an international route connecting United States with Ecuador. It is an intercontinental flight between North America and South America. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 10:02 in Seattle, it's 12:02 in Quito.

There is a significant elevation difference of 9,178 feet between the two airports. Nuevo Aeropuerto Internacional Mariscal Sucre sits higher than Boeing Field/King County International Airport. Travelers arriving at the higher-elevation airport should be aware of potential altitude effects.

The return flight from Quito (UIO) to Seattle (BFI) follows a heading of 328° (north northwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Boeing Field/King County International Airport (BFI) and Nuevo Aeropuerto Internacional Mariscal Sucre (UIO) detail pages, or use our flight duration calculator to compare other routes.