Nonstop flight route between Belfast, Northern Ireland, United Kingdom and Seattle, Washington, United States:

About this route:

A direct, nonstop flight between Belfast International Airport (BFS), Belfast, Northern Ireland, United Kingdom and King County International Airport (BFI), Seattle, Washington, United States would travel a Great Circle distance of 4,459 miles (or 7,176 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 Belfast International Airport and King County International 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 Belfast International Airport and King County International 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 Belfast International Airport (BFS):

• A new International Pier was built together with lounge facilities and car parks, while an additional apron was provided to separate the smaller general aviation aircraft from large commercial jets.
• Because of Belfast International Airport's relatively low elevation of 268 feet, planes can take off or land at Belfast 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.
• Belfast International Airport (BFS) has 2 runways.
• In addition to being known as "Belfast International Airport", another name for BFS is "Belfast/Aldergrove Airport".
• During the Second World War, Aldergrove remained an RAF base particularly for the Coastal Command.
• In 1971 Northern Ireland Airports Limited was formed to operate and develop the airport and its facilities.
• Belfast International Airport is a major airport located 11.5 NM northwest of Belfast in Northern Ireland.
• The furthest airport from Belfast International Airport (BFS) is Ryan's Creek Aerodrome (SZS), which is located 11,847 miles (19,065 kilometers) away in Stewart Island, New Zealand.
• Belfast International Airport handled 4,023,336 passengers last year.
• Between 2006 - 2008, both easyJet and Aer Lingus established a number of new routes for Belfast including Berlin, Budapest, Prague, Rome, Munich and Venice, all of which were eventually scrapped.
• One of the outcomes of the wartime airfield construction programme was the building of Nutts Corner Airport, just 3 mi from Aldergrove.
• Work has been completed within the airport to move the 'Central Search' area from its previous location, this is part of a bigger plan to increase the area for the main departure Lounge.
• The closest airport to Belfast International Airport (BFS) is George Best Belfast City Airport (BHD), which is located only 14 miles (23 kilometers) E of BFS.
• The airport lies within the parish of Killead, between the small villages of Killead and Aldergrove.

Facts about King County International Airport (BFI):

• King County International Airport (BFI) has 2 runways.
• In addition to being known as "King County International Airport", another name for BFI is "Boeing Field".
• The King County International Airport contracts with the King County Sheriff's Office for police services.
• The closest airport to King County International Airport (BFI) is Renton Municipal Airport (RNT), which is located only 5 miles (8 kilometers) ESE of BFI.
• The furthest airport from King County International Airport (BFI) is Tôlanaro Airport (FTU), which is located 10,775 miles (17,341 kilometers) away in Tôlanaro, Madagascar.
• Boeing Field/King County International Airport covers 634 acres at an elevation of 21 feet above mean sea level.
• Because of King County International Airport's relatively low elevation of 21 feet, planes can take off or land at King County 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.