Nonstop flight route between Portsmouth, New Hampshire, United States and Barter Island, Alaska, United States:

About this route:

A direct, nonstop flight between Portsmouth International Airport at Pease (PSM), Portsmouth, New Hampshire, United States and Barter Island LRRS Airport (BTI), Barter Island, Alaska, United States would travel a Great Circle distance of 3,060 miles (or 4,924 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 Portsmouth International Airport at Pease and Barter Island LRRS 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 Portsmouth International Airport at Pease and Barter Island LRRS 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 Portsmouth International Airport at Pease (PSM):

• Portsmouth International Airport at Pease (PSM) currently has only 1 runway.
• The closest airport to Portsmouth International Airport at Pease (PSM) is Sanford Seacoast Regional Airport (SFM), which is located 23 miles (36 kilometers) NNE of PSM.
• It shares the runway with the Pease Air National Guard Base, which is actively utilized by the 157th Air Refueling Wing of the New Hampshire Air National Guard, an Air Mobility Command -gained Air National Guard unit operating the KC-135R Stratotanker aircraft.
• The furthest airport from Portsmouth International Airport at Pease (PSM) is Margaret River Airport (MGV), which is located 11,729 miles (18,875 kilometers) away in Margaret River, Western Australia, Australia.
• Because of Portsmouth International Airport at Pease's relatively low elevation of 100 feet, planes can take off or land at Portsmouth International Airport at Pease 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 airport served as a hub for Pan Am from 1998 until 2005, when all mainline Pan Am flights at the airport were suspended.

Facts about Barter Island LRRS Airport (BTI):

• The original runway was built by the United States military in 1947.
• Because of Barter Island LRRS Airport's relatively low elevation of 2 feet, planes can take off or land at Barter Island LRRS 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.
• Each of the sites was staffed by civilian contract workers who had signed 18-month contracts, although they were visited by Air Force military personnel frequently.
• The furthest airport from Barter Island LRRS Airport (BTI) is Teniente Rodolfo Marsh Airport (TNM), which is located 10,003 miles (16,099 kilometers) away in Villa Las Estrellas, Antarctica.
• The closest airport to Barter Island LRRS Airport (BTI) is Deadhorse Airport (SCC), which is located 115 miles (184 kilometers) W of BTI.
• With the signing of the North American Air Defence Modernization agreement at the "Shamrock Summit" between Prime Minister Mulroney and President Reagan in Quebec City on 18 March 1985, the DEW Line began its eventual upgrading and transition becoming the North Warning System of today.
• In addition to being known as "Barter Island LRRS Airport", another name for BTI is "Barter Island LRRS BAR-MAIN".
• Barter Island LRRS Airport (BTI) currently has only 1 runway.