Nonstop flight route between Helena, Montana, United States and Shannon (County Clare), Ireland:

About this route:

A direct, nonstop flight between Helena Regional Airport (HLN), Helena, Montana, United States and Shannon Airport (SNN), Shannon (County Clare), Ireland would travel a Great Circle distance of 4,218 miles (or 6,789 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 Helena Regional Airport 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 Helena Regional Airport 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 Helena Regional Airport (HLN):

• The closest airport to Helena Regional Airport (HLN) is Bert Mooney Airport (BTM), which is located 51 miles (83 kilometers) SSW of HLN.
• In addition to being known as "Helena Regional Airport", another name for HLN is "Helena Army Airfield".
• The furthest airport from Helena Regional Airport (HLN) is Sir Gaëtan Duval Airport (RRG), which is located 10,563 miles (17,000 kilometers) away in Rodrigues Island, Mauritius.
• Helena Regional Airport is a public airport two miles northeast of Helena, in Lewis and Clark County, Montana.
• Helena Regional Airport (HLN) has 3 runways.

Facts about Shannon Airport (SNN):

• Shannon Airport (SNN) currently has only 1 runway.
• Shannon Airport handled 1,400,032 passengers last year.
• 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.
• The first passengers through the newly autonomous airport arrived on the Aer Lingus EI-110 flight from JFK at 5:08 am on 1 January 2013.
• When World War II ended, the airport was ready to be used by the many new post-war commercial airlines of Europe and North America.
• With the demise of the Soviet Union in the early 1990s, Aeroflot began to suffer, which was a big loss to the airport.
• In December 2012, it was announced that Shannon Airport would separate from the Dublin Airport Authority, who still own Dublin and Cork airports.
• The 1980s saw a number of new airlines arrive at Shannon.
• The closest airport to Shannon Airport (SNN) is Inisheer Aerodrome (INQ), which is located 35 miles (56 kilometers) NW of SNN.
• 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.
• In addition to being known as "Shannon Airport", another name for SNN is "Aerfort na Sionainne".