Nonstop flight route between SeaTac (near Seattle and Tacoma), Washington, United States and Udon Thani, Thailand:

About this route:

A direct, nonstop flight between Seattle–Tacoma International Airport (SEA), SeaTac (near Seattle and Tacoma), Washington, United States and Udon Thani International Airport ท่าอากาศยานอุดรธานี (UTH), Udon Thani, Thailand would travel a Great Circle distance of 7,159 miles (or 11,522 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 Seattle–Tacoma International Airport and Udon Thani International Airport ท่าอากาศยานอุดรธานี, 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 Seattle–Tacoma International Airport and Udon Thani International Airport ท่าอากาศยานอุดรธานี. 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 Seattle–Tacoma International Airport (SEA):

• 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.
• Seattle–Tacoma International Airport handled 34,776,666 passengers last year.
• 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.
• There is also a scheduled bus service to downtown Vancouver, Canada, through Quick Shuttle, with other pick-up stops at downtown Seattle, Bellingham International Airport, and drop-off stops just inside the Canadian–U.S.
• 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.
• 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.
• Seattle–Tacoma International Airport (SEA) has 3 runways.
• Citing increased landing fees and other costs due to the aforementioned work at the airport, Southwest Airlines threatened in 2005 to move to nearby Boeing Field.
• The two-story North Concourse added four new gate positions and a new wing 600 feet long and 30 feet wide.
• In addition to being known as "Seattle–Tacoma International Airport", another name for SEA is "Sea–Tac Airport".
• The new 3rd runway opened on November 20, 2008, with a total construction cost of $1.1 billion.

Facts about Udon Thani International Airport ท่าอากาศยานอุดรธานี (UTH):

• Udon Thani International Airport ท่าอากาศยานอุดรธานี (UTH) currently has only 1 runway.
• The closest airport to Udon Thani International Airport ท่าอากาศยานอุดรธานี (UTH) is Wattay International Airport (VTE), which is located 44 miles (71 kilometers) NNW of UTH.
• During the Vietnam War the facility was known as Udorn Royal Thai Air Force Base, serving as a front-line base of the United States Air Force and was the Asian Headquarters for Air America.
• Because of Udon Thani International Airport ท่าอากาศยานอุดรธานี's relatively low elevation of 579 feet, planes can take off or land at Udon Thani International Airport ท่าอากาศยานอุดรธานี 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.
• As well as being a commercial facility, Udon Thani International Airport is also an active Royal Thai Air Force base, the home of Wing 23, 2nd Air Division Air Combat Command.
• The furthest airport from Udon Thani International Airport ท่าอากาศยานอุดรธานี (UTH) is Maria Reiche Neuman Airport (NZC), which is nearly antipodal to Udon Thani International Airport ท่าอากาศยานอุดรธานี (meaning Udon Thani International Airport ท่าอากาศยานอุดรธานี is almost on the exact opposite side of the Earth from Maria Reiche Neuman Airport), and is located 12,207 miles (19,645 kilometers) away in Nazca, Ica Region, Peru.