The flight distance from St Louis Lambert International Airport (STL) in St Louis, United States to Nuevo Aeropuerto Internacional Mariscal Sucre (UIO) in Quito, Ecuador is 4,494 kilometers (2,792 miles / 2,426 nautical miles). The estimated flight time for this route is approximately 6h, flying south southeast at a heading of 161°.

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 05:25 in St Louis, it's 06:25 in Quito.

There is a significant elevation difference of 8,583 feet between the two airports. Nuevo Aeropuerto Internacional Mariscal Sucre sits higher than St Louis Lambert International Airport. Travelers arriving at the higher-elevation airport should be aware of potential altitude effects.

The return flight from Quito (UIO) to St Louis (STL) follows a heading of 346° (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 St Louis Lambert International Airport (STL) and Nuevo Aeropuerto Internacional Mariscal Sucre (UIO) detail pages, or use our flight duration calculator to compare other routes.