Nonstop flight route between Seward, Alaska, United States and Tainan City, Taiwan, Republic of China:

About this route:

A direct, nonstop flight between Seward Airport (SWD), Seward, Alaska, United States and Tainan Airport (TNN), Tainan City, Taiwan, Republic of China would travel a Great Circle distance of 4,866 miles (or 7,830 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 Seward Airport and Tainan 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 Seward Airport and Tainan 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 Seward Airport (SWD):

• The closest airport to Seward Airport (SWD) is Chenega Bay Airport (NCN), which is located 49 miles (79 kilometers) E of SWD.
• The furthest airport from Seward Airport (SWD) is Port Elizabeth International Airport (PLZ), which is located 10,617 miles (17,086 kilometers) away in Port Elizabeth, South Africa.
• Seward Airport (SWD) has 2 runways.
• The airport was built during World War II.
• Because of Seward Airport's relatively low elevation of 22 feet, planes can take off or land at Seward 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.

Facts about Tainan Airport (TNN):

• On 24 February 1969, Far Eastern Air Transport Flight 104, a Handley Page Dart Herald with 36 passengers and crew board, crashed while attempting an emergency landing at Tainan.
• On 16 April 1977, a FEAT Douglas C-47A B-247 was damaged beyond economic repair in a landing accident.
• Because of Tainan Airport's relatively low elevation of 63 feet, planes can take off or land at Tainan 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 Tainan Airport (TNN) is Dr. Luis María Argaña International Airport (ESG), which is nearly antipodal to Tainan Airport (meaning Tainan Airport is almost on the exact opposite side of the Earth from Dr. Luis María Argaña International Airport), and is located 12,355 miles (19,883 kilometers) away in Mariscal Estigarribia, Paraguay.
• The closest airport to Tainan Airport (TNN) is Kaohsiung International Airport (Kaohsiung Siaogang Airport) (KHH), which is located 27 miles (44 kilometers) SSE of TNN.
• It is the third busiest domestic airport after Taipei Songshan Airport and Kaohsiung Airport.
• On 21 March 2003, TransAsia Airways flight 543 on a flight from Taipei Songshan Airport to Tainan Airport, collided with a truck that was on runway 36R.
• A number of US units have been stationed at Tainan Air Base, including the 868th Tactical Missile Squadron from 1958 to 1962, which operated MGM-1 Matadors, probably under the ultimate control of the United States Taiwan Defense Command.
• Tainan Airport (TNN) has 2 runways.
• In addition to being known as "Tainan Airport", other names for TNN include "臺南航空站台南機場" and "Táinán HángkōngzhànTáinán Jīchǎng".