Nonstop flight route between Fort Sill, Oklahoma, United States and Mirabel (near Montreal), Quebec, Canada:
Departure Airport:

Arrival Airport:

Distance from FSI to YMX:
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- About this route
- FSI Airport Information
- YMX Airport Information
- Facts about FSI
- Facts about YMX
- Map of Nearest Airports to FSI
- List of Nearest Airports to FSI
- Map of Furthest Airports from FSI
- List of Furthest Airports from FSI
- Map of Nearest Airports to YMX
- List of Nearest Airports to YMX
- Map of Furthest Airports from YMX
- List of Furthest Airports from YMX
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Montréal–Mirabel International Airport (YMX), Mirabel (near Montreal), Quebec, Canada would travel a Great Circle distance of 1,486 miles (or 2,392 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 relatively short distance between Henry Post Army Airfield and Montréal–Mirabel International Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
IATA / ICAO Codes: | FSI / KFSI |
Airport Name: | Henry Post Army Airfield |
Location: | Fort Sill, Oklahoma, United States |
GPS Coordinates: | 34°38'58"N by 98°24'7"W |
Operator/Owner: | U.S. Army ATCA-ASO |
Airport Type: | Military |
Elevation: | 1189 feet (362 meters) |
# of Runways: | 1 |
View all routes: | Routes from FSI |
More Information: | FSI Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | YMX / CYMX |
Airport Names: |
|
Location: | Mirabel (near Montreal), Quebec, Canada |
GPS Coordinates: | 45°40'46"N by 74°2'18"W |
Area Served: | Montreal, Quebec |
Operator/Owner: | Transport Canada |
Airport Type: | Public |
Elevation: | 271 feet (83 meters) |
# of Runways: | 2 |
View all routes: | Routes from YMX |
More Information: | YMX Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- The Fort Sill Army Radar Approach Control is the Army's Second busiest Air Traffic Control Facility, providing Radar Approach Control service to Henry Post Army Air Field, Lawton/Fort Sill Regional Airport, Duncan/Haliburton Airport and many smaller airports in the area.
- As a result of the United State's entry into World War I, Fort Sill was selected for a primary pilot school.
- 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.
- By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.
- Henry Post Army Airfield is a military use airport located at Fort Sill in Comanche County, Oklahoma, United States.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
- 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 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.
Facts about Montréal–Mirabel International Airport (YMX):
- Because of Montréal–Mirabel International Airport's relatively low elevation of 271 feet, planes can take off or land at Montréal–Mirabel International 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 March 1969, the federal and provincial governments reached a compromise to locate at the St.
- The airport is 55 km northwest of Downtown Montreal and 47 km northwest of Trudeau Airport.
- The closest airport to Montréal–Mirabel International Airport (YMX) is Cartierville Airport (YCV), which is located only 19 miles (31 kilometers) SE of YMX.
- After 1976, Mirabel and Dorval began to decline in importance due to the increasing use in the 1980s of longer-range jets that did not need to refuel in Montréal before crossing the Atlantic.
- High-speed rail transit for the Montréal–Mirabel run), initially to be called TRRAMM, was intended to be completed at a later date.
- In May 2007, it was reported that the International Center of Advanced Racing had signed a 25 year lease with Aéroports de Montréal to use part of the airport as a race track.
- Montréal–Mirabel International Airport (YMX) has 2 runways.
- The federal government predicted that Dorval would be completely saturated by 1985 as part of its justification for building Mirabel.
- The furthest airport from Montréal–Mirabel International Airport (YMX) is Margaret River Airport (MGV), which is located 11,493 miles (18,495 kilometers) away in Margaret River, Western Australia, Australia.
- In addition to being known as "Montréal–Mirabel International Airport", another name for YMX is "Aéroport international Montréal–Mirabel".
- Mirabel was designed to be eventually expanded to six runways and six terminal buildings, with a separate STOLport also planned.