Nonstop flight route between Portsmouth, New Hampshire, United States and Shannon (County Clare), Ireland:

About this route:

A direct, nonstop flight between Portsmouth International Airport at Pease (PSM), Portsmouth, New Hampshire, United States and Shannon Airport (SNN), Shannon (County Clare), Ireland would travel a Great Circle distance of 2,850 miles (or 4,587 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 Shannon 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 Shannon 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):

• The airport served as a hub for Pan Am from 1998 until 2005, when all mainline Pan Am flights at the airport were suspended.
• The airport is located within the Pease International Tradeport, a result of the ongoing redevelopment of the former Pease Air Force Base which was closed under Base Realignment and Closure Commission action in the late 1980s and early 1990s.
• 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 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.
• Portsmouth International Airport at Pease (PSM) currently has only 1 runway.
• Portsmouth International Airport at Pease, formerly known as Pease International Airport, is a joint civil and military use airport located one nautical mile west of the central business district of Portsmouth, a city in Rockingham County, New Hampshire, United States.
• 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.

Facts about Shannon Airport (SNN):

• Shannon Airport (SNN) currently has only 1 runway.
• In 1958, the Irish airline Aer Lingus began transatlantic service to the United States, using Lockheed Super Constellations for thrice-weekly service to New York City and Boston.
• In addition to being known as "Shannon Airport", another name for SNN is "Aerfort na Sionainne".
• The furthest airport from Shannon Airport (SNN) is Ryan's Creek Aerodrome (SZS), which is nearly antipodal to Shannon Airport (meaning Shannon Airport is almost on the exact opposite side of the Earth from Ryan's Creek Aerodrome), and is located 12,015 miles (19,336 kilometers) away in Stewart Island, New Zealand.
• In 1936, the Government of Ireland confirmed that it would develop a 3.1 km2 site at Rineanna for the country's first transatlantic airport.
• Because of Shannon Airport's relatively low elevation of 46 feet, planes can take off or land at Shannon 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.
• Shannon Airport handled 1,400,032 passengers last year.
• In December 2012, it was announced that Shannon Airport would separate from the Dublin Airport Authority, who still own Dublin and Cork airports.
• With the demise of the Soviet Union in the early 1990s, Aeroflot began to suffer, which was a big loss to the airport.
• The closest airport to Shannon Airport (SNN) is Inisheer Aerodrome (INQ), which is located 35 miles (56 kilometers) NW of SNN.