The flight distance from St Louis Lambert International Airport (STL) in St Louis, United States to Viseu Airport (VSE) in Viseu Airport, Portugal is 6,776 kilometers (4,210 miles / 3,659 nautical miles). The estimated flight time for this route is approximately 9h, flying east northeast at a heading of 59°.

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 Portugal. It is an intercontinental flight between North America and Europe. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 13:21 in St Louis, it's 19:21 in Viseu Airport. With a 6-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

There is a significant elevation difference of 1,443 feet between the two airports. Viseu Airport sits higher than St Louis Lambert International Airport.

The return flight from Viseu Airport (VSE) to St Louis (STL) follows a heading of 298° (west 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 Viseu Airport (VSE) detail pages, or use our flight duration calculator to compare other routes.