Nonstop flight route between Helena, Montana, United States and Knock, Ireland:

About this route:

A direct, nonstop flight between Helena Regional Airport (HLN), Helena, Montana, United States and Ireland West Airport Knock (NOC), Knock, Ireland would travel a Great Circle distance of 4,168 miles (or 6,708 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 Ireland West Airport Knock, 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 Ireland West Airport Knock. 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):

• Helena Regional Airport (HLN) has 3 runways.
• The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a primary commercial service airport.Federal Aviation Administration records say the airport had 85,649 passenger boardings in calendar year 2008, 88,314 in 2009 and 98,193 in 2010.
• 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.
• 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".

Facts about Ireland West Airport Knock (NOC):

• The furthest airport from Ireland West Airport Knock (NOC) is Ryan's Creek Aerodrome (SZS), which is located 11,934 miles (19,206 kilometers) away in Stewart Island, New Zealand.
• The closest airport to Ireland West Airport Knock (NOC) is Sligo Airport (SXL), which is located 27 miles (44 kilometers) NNE of NOC.
• The nearest railway stations are Ballyhaunis, Foxford and Claremorris, accessible by taxi and bus.
• On 21 February 2007, the Government of Ireland announced that it was making a €27 million capital grant.
• On 1 June 2003, hundreds of people gathered to view a Boeing 747 land with 500 returning pilgrims from Lourdes.
• In 2011, the month of August was the busiest in the airport's history with 84,052 passengers.
• Because of Ireland West Airport Knock's relatively low elevation of 665 feet, planes can take off or land at Ireland West Airport Knock 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 November 2011 Ryanair announced flights to Beauvais-Tillé, Frankfurt Hahn, Bergamo-Orio al Serio and Girona-Costa Brava from March 2012.
• Ireland West Airport Knock is 5.6km south-west of Charlestown, County Mayo, Ireland.
• In addition to being known as "Ireland West Airport Knock", other names for NOC include "Horan International Airport" and "Aerfort Iarthar Éireann".
• Ireland West Airport Knock handled 665,000 passengers last year.
• Ireland West Airport Knock (NOC) currently has only 1 runway.
• In 2005 the airport changed its name to Ireland West Airport Knock.