Nonstop flight route between Fort Sill, Oklahoma, United States and Alert, Nunavut, Canada:

About this route:

A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Alert Airport (YLT), Alert, Nunavut, Canada would travel a Great Circle distance of 3,416 miles (or 5,497 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 Henry Post Army Airfield and Alert 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 Henry Post Army Airfield and Alert 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 Henry Post Army Airfield (FSI):

• The closest airport to Henry Post Army Airfield (FSI) is Lawton–Fort Sill Regional Airport (LAW), which is located only 6 miles (9 kilometers) S of FSI.
• The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
• Henry Post Army Airfield was the first home of all Army Aviation Training after World War II before moving to Fort Rucker, Alabama in 1954.
• The furthest airport from Henry Post Army Airfield (FSI) is Sir Gaëtan Duval Airport (RRG), which is located 10,920 miles (17,575 kilometers) away in Rodrigues Island, Mauritius.
• By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.
• Henry Post Army Airfield (FSI) currently has only 1 runway.
• With the end of World War I, in October 1919 Post Field was deactivated as an active duty airfield in accordance with sharply reduced military budgets, and a small caretaker unit was assigned to the facility for administrative reasons to support the balloon school/company.
• The Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.

Facts about Alert Airport (YLT):

• Alert Airport (YLT) currently has only 1 runway.
• There have been two crashes involving fatalities at the airfield since it was established.
• The closest airport to Alert Airport (YLT) is Eureka Aerodrome (YEU), which is located 299 miles (481 kilometers) WSW of YLT.
• Because of Alert Airport's relatively low elevation of 100 feet, planes can take off or land at Alert 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.
• The furthest airport from Alert Airport (YLT) is Teniente Rodolfo Marsh Airport (TNM), which is located 9,999 miles (16,092 kilometers) away in Villa Las Estrellas, Antarctica.
• A weather station was established on the site in 1950, and in 1957 construction began on the military facilities which are still in use to this day.