Nonstop flight route between Helena, Montana, United States and Trincomalee, Sri Lanka:

About this route:

A direct, nonstop flight between Helena Regional Airport (HLN), Helena, Montana, United States and China Bay Airport (TRR), Trincomalee, Sri Lanka would travel a Great Circle distance of 8,541 miles (or 13,745 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 China Bay 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 China Bay 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):

• In addition to being known as "Helena Regional Airport", another name for HLN is "Helena Army Airfield".
• Helena Regional Airport (HLN) has 3 runways.
• Helena Regional Airport is a public airport two miles northeast of Helena, in Lewis and Clark County, Montana.
• 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.
• 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.

Facts about China Bay Airport (TRR):

• Originally built by the British during their Empire colonial times, it was transferred to the Royal Ceylonese Air Force which later became the Sri Lanka Air Force.
• China Bay Airport (TRR) currently has only 1 runway.
• The closest airport to China Bay Airport (TRR) is Anuradhapura Airport (ACJ), which is located 54 miles (87 kilometers) WSW of TRR.
• A number of RAF squadrons and other units were stationed at the airfield during and immediately after the war.
• The furthest airport from China Bay Airport (TRR) is Seymour Airport (GPS), which is located 11,625 miles (18,709 kilometers) away in Baltra Island, Galápagos Islands, Ecuador.
• In addition to being known as "China Bay Airport", another name for TRR is "சீனக்குடா விமான நிலையம்චීන වරාය ගුවන්තොටුපළ".
• The base houses the Sri Lanka Air Force Academy.
• Because of China Bay Airport's relatively low elevation of 7 feet, planes can take off or land at China Bay 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.