Nonstop flight route between Porto, Portugal and Great Falls, Montana, United States:

About this route:

A direct, nonstop flight between Francisco Sá Carneiro Airport (OPO), Porto, Portugal and Malmstrom Air Force Base (GFA), Great Falls, Montana, United States would travel a Great Circle distance of 4,692 miles (or 7,552 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 Francisco Sá Carneiro Airport and Malmstrom Air Force Base, 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 Francisco Sá Carneiro Airport and Malmstrom Air Force Base. 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 Francisco Sá Carneiro Airport (OPO):

• The closest airport to Francisco Sá Carneiro Airport (OPO) is Braga Airport (BGZ), which is located 27 miles (44 kilometers) NNE of OPO.
• Along with the airports in Lisbon, Horta, Faro, Flores, Santa Maria, Ponta Delgada and Beja, the airport's concessions to provide support to civil aviation was conceded to ANA Aeroportos de Portugal on 18 December 1998, under provisions of decree 404/98.
• Francisco Sá Carneiro Airport (OPO) currently has only 1 runway.
• Francisco Sá Carneiro Airport handled 6,050,094 passengers last year.
• 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".
• 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.

Facts about Malmstrom Air Force Base (GFA):

• Z-147 was completely replaced by a new ARSR-4 JSS site on Bootlegger Ridge, about 14 miles northeast of Great Falls AFB.
• DC-20 was initially under the Great Falls Air Defense Sector, established on 1 March 1959.
• The furthest airport from Malmstrom Air Force Base (GFA) is Sir Gaëtan Duval Airport (RRG), which is located 10,495 miles (16,891 kilometers) away in Rodrigues Island, Mauritius.
• Great Falls AAB was assigned to II Bomber Command, Second Air Force.
• Great Falls was reassigned to the Central Air Defense Force at Richards-Gebaur Air Force Base in 1953.
• At Great Falls, P-39 Airacobras, C-47 Skytrains, B-25 Mitchells, and A-20 Havocs aircraft.
• On 18 December 1953, Great Falls AFB was transferred from Military Air Transport Service to Strategic Air Command, although MATS units remained at the base for several years.
• The closest airport to Malmstrom Air Force Base (GFA) is Great Falls International Airport (GTF), which is located only 9 miles (14 kilometers) W of GFA.
• In 1957, under the control of the 801st Aircraft Control and Warning Squadron, the Malmstrom AFB radar station became operational with AN/FPS-20 search and AN/FPS-6 height-finder radars.
• In addition to being known as "Malmstrom Air Force Base", another name for GFA is "Malmstrom AFB".