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):

• 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.
• 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 site for the airport was established in 1917 when it was selected to be a Royal Flying Corps training establishment during the First World War.
• Belfast International Airport handled 4,023,336 passengers last year.
• 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.
• Despite these additional flights, passengers at Belfast International did not rise beyond 6 million in 2008 as some had predicted but in fact fell by 10,000 passengers to 5.2 million.
• The airport lies within the parish of Killead, between the small villages of Killead and Aldergrove.
• One of the outcomes of the wartime airfield construction programme was the building of Nutts Corner Airport, just 3 mi from Aldergrove.
• 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.
• In addition to being known as "Belfast International Airport", another name for BFS is "Belfast/Aldergrove Airport".
• 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.
• Belfast International has a CAA Public Use Aerodrome Licence that allows flights for the public transport of passengers or for flying instruction.
• Belfast International Airport (BFS) has 2 runways.

Facts about King County International Airport (BFI):

• Boeing Field/King County International Airport covers 634 acres at an elevation of 21 feet above mean sea level.
• 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.
• King County International Airport (BFI) has 2 runways.
• 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.
• 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, officially King County International Airport, is a public airport owned and operated by King County, five miles south of downtown Seattle, Washington.
• 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.