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

About this route:

A direct, nonstop flight between City of Derry Airport (LDY), Derry, Northern Ireland, United Kingdom and King County International Airport (BFI), Seattle, Washington, United States would travel a Great Circle distance of 4,414 miles (or 7,104 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 City of Derry 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 City of Derry 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 City of Derry Airport (LDY):

• City of Derry Airport (LDY) currently has only 1 runway.
• A major redevelopment programme was undertaken by the Council from 1989 to 1993 with grant aid from the European Regional Development Fund.
• In April 2009 the council issued tender documents for a multi-million pound expansion of the terminal to improve passenger flow and meet current EU customs and immigration regulations.
• At the end of 2008, British Airways, operated by Loganair as a franchise agreement, ceased the Glasgow International route which had operated for 30 years, following the loss in July 2008 of their public service obligation route to Dublin.
• The closest airport to City of Derry Airport (LDY) is Belfast International Airport (BFS), which is located 46 miles (74 kilometers) SE of LDY.
• 2010 saw the commencement of a new route to Faro with Ryanair, the airport's second scheduled international destination.
• Because of City of Derry Airport's relatively low elevation of 23 feet, planes can take off or land at City of Derry 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.
• In addition to being known as "City of Derry Airport", another name for LDY is "Londonderry/Eglinton Airport[1]".
• City of Derry Airport handled 384,973 passengers last year.
• On 9 October 2009, Derry City Council who own and operate the airport began the process which will lead to the privatisation of the facility.
• The furthest airport from City of Derry Airport (LDY) is Ryan's Creek Aerodrome (SZS), which is located 11,838 miles (19,051 kilometers) away in Stewart Island, New Zealand.
• City of Derry Airport is an airport located 7 mi northeast of Derry, Northern Ireland.

Facts about King County International Airport (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.
• King County International Airport (BFI) has 2 runways.
• 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.
• The initial assembly of the 737 was at Boeing Field in the 1960s because the factory in Renton was at capacity building the 707 and 727.
• Helijet, a helicopter airline based at Vancouver International Airport in British Columbia, scheduled Sikorsky S-76s to the Victoria Harbour Heliport in British Columbia and on to Helijet's Vancouver Harbour Heliport near downtown Vancouver, B.C.
• In addition to being known as "King County International Airport", another name for BFI is "Boeing Field".
• 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.