Nonstop flight route between Hatfield, Hertfordshire, England, United Kingdom and SeaTac (near Seattle and Tacoma), Washington, United States:

About this route:

A direct, nonstop flight between Hatfield Aerodrome (HTF), Hatfield, Hertfordshire, England, United Kingdom and Seattle–Tacoma International Airport (SEA), SeaTac (near Seattle and Tacoma), Washington, United States would travel a Great Circle distance of 4,775 miles (or 7,685 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 Hatfield Aerodrome and Seattle–Tacoma 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 Hatfield Aerodrome and Seattle–Tacoma 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 Hatfield Aerodrome (HTF):

• Hatfield Aerodrome (HTF) has 2 runways.
• In 1934 significant works were undertaken at the site and a large factory and imposing Art Deco administration buildings were constructed together with a flying school building which also housed flying control.
• Geoffrey de Havilland, pioneering aircraft designer and founder of the de Havilland Aircraft Company purchased some farmland close to Hatfield as his existing site at Stag Lane, Edgware was being encroached upon by expanding housing developments in the London suburbs.
• The Hatfield Aerodrome History Trail was officially opened on 24 November 2010.
• The furthest airport from Hatfield Aerodrome (HTF) is Chatham Islands (CHT), which is located 11,860 miles (19,086 kilometers) away in Waitangi, Chatham Islands, New Zealand.
• The redevelopment of the main airfield site commenced in the late 1990s.
• The 146 first flew in 1981 and production of some components, final assembly and flight testing of the first two series of the aircraft was based at Hatfield during the early and mid 1980s.
• The closest airport to Hatfield Aerodrome (HTF) is London Luton Airport (LTN), which is located only 9 miles (15 kilometers) NNW of HTF.
• Because of Hatfield Aerodrome's relatively low elevation of 254 feet, planes can take off or land at Hatfield Aerodrome 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 Seattle–Tacoma International Airport (SEA):

• Because of Seattle–Tacoma International Airport's relatively low elevation of 433 feet, planes can take off or land at Seattle–Tacoma 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.
• Seattle–Tacoma International Airport (SEA) has 3 runways.
• Seattle's Central Link light-rail line serves the airport at the SeaTac/Airport Station, which opened on December 19, 2009.
• The top five carriers at the airport in number of passengers carried in 2012 were Alaska Airlines, Horizon Air, Delta Air Lines, Southwest Airlines, and United Airlines.
• The furthest airport from Seattle–Tacoma International Airport (SEA) is Tôlanaro Airport (FTU), which is located 10,781 miles (17,350 kilometers) away in Tôlanaro, Madagascar.
• In 2007 the airport, together with the University of Illinois Center of Excellence for Airport Technology, became the first airport to implement an avian radar system providing 24-hour monitoring of wildlife activity across the airfield.
• Seattle–Tacoma International Airport handled 34,776,666 passengers last year.
• In addition to being known as "Seattle–Tacoma International Airport", another name for SEA is "Sea–Tac Airport".
• The closest airport to Seattle–Tacoma International Airport (SEA) is Renton Municipal Airport (RNT), which is located only 5 miles (9 kilometers) NE of SEA.
• Residents of the surrounding area filed lawsuits against the Port in the early 1970s, complaining of noise, vibration, smoke, and other problems.
• The airport was constructed by the Port of Seattle in 1944 to serve civilians of the region, after the U.S.