Nonstop flight route between St. Louis, Missouri, United States and Porto, Portugal:

About this route:

A direct, nonstop flight between Lambert–St. Louis International Airport (STL), St. Louis, Missouri, United States and Francisco Sá Carneiro Airport (OPO), Porto, Portugal would travel a Great Circle distance of 4,158 miles (or 6,691 kilometers).

A Great Circle is the shortest distance between 2 points on a sphere. Because most world maps are flat (but the Earth is round), the route of the shortest distance between 2 points on the Earth will often appear curved when viewed on a flat map, especially for long distances. If you were to simply draw a straight line on a flat map and measure a very long distance, it would likely be much further than if you were to lay a string between those two points on a globe. Because of the large distance between Lambert–St. Louis International Airport and Francisco Sá Carneiro Airport, the route shown on this map most likely appears curved because of this reason.

Try it at home! Get a globe and tightly lay a string between Lambert–St. Louis International Airport and Francisco Sá Carneiro Airport. You'll see that it will travel the same route of the red line on this map!

Departure Airport Information:

Arrival Airport Information:

Facts about Lambert–St. Louis International Airport (STL):

• American Airline's merger closed in April 2001, and the last TWA flight was flown on December 1, 2001.
• Lambert–St. Louis International Airport (STL) has 4 runways.
• The closest airport to Lambert–St. Louis International Airport (STL) is St. Louis Downtown Airport (CPS), which is located only 16 miles (27 kilometers) SE of STL.
• In 1982, Trans World Airlines moved its hub from Kansas City International Airport.
• In the late 1920s, Lambert Field became the first airport with an air traffic control system—albeit one that communicated with pilots via waving flags.
• Because of Lambert–St. Louis International Airport's relatively low elevation of 605 feet, planes can take off or land at Lambert–St. Louis International Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
• During 2008, Lambert's position as an American Airlines hub faced further pressure due to increased fuel costs and softened demand because of a depressed economy.
• The furthest airport from Lambert–St. Louis International Airport (STL) is Margaret River Airport (MGV), which is located 10,986 miles (17,681 kilometers) away in Margaret River, Western Australia, Australia.

Facts about Francisco Sá Carneiro Airport (OPO):

• Because of Francisco Sá Carneiro Airport's relatively low elevation of 226 feet, planes can take off or land at Francisco Sá Carneiro Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
• Francisco Sá Carneiro Airport (OPO) currently has only 1 runway.
• The furthest airport from Francisco Sá Carneiro Airport (OPO) is Westport Airport (WSZ), which is nearly antipodal to Francisco Sá Carneiro Airport (meaning Francisco Sá Carneiro Airport is almost on the exact opposite side of the Earth from Westport Airport), and is located 12,400 miles (19,955 kilometers) away in Westport, New Zealand.
• In addition to being known as "Francisco Sá Carneiro Airport", another name for OPO is "Aeroporto Francisco Sá Carneiro".
• Francisco Sá Carneiro Airport handled 6,050,094 passengers last year.
• The closest airport to Francisco Sá Carneiro Airport (OPO) is Braga Airport (BGZ), which is located 27 miles (44 kilometers) NNE of OPO.
• It includes an area of between 72 metres in the extreme south and 43 metres in the north.
• Porto Airport reached its six millionth passenger mark on 30 December 2011.