Nonstop flight route between Fort Sill, Oklahoma, United States and St. Catharines, Ontario, Canada:
Departure Airport:
(34°38'58"N by 98°24'7"W)
Arrival Airport:
(43°11'30"N by 79°10'15"W)
Distance from FSI to YCM:
1,186.25 miles (1,909.08 km)
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Jump to:
- About this route
- FSI Airport Information
- YCM Airport Information
- Facts about FSI
- Facts about YCM
- 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 YCM
- List of Nearest Airports to YCM
- Map of Furthest Airports from YCM
- List of Furthest Airports from YCM
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and St. Catharines/Niagara District Airport (YCM), St. Catharines, Ontario, Canada would travel a Great Circle distance of 1,186 miles (or 1,909 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 St. Catharines/Niagara District 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: | YCM / CYSN |
| Airport Name: | St. Catharines/Niagara District Airport |
| Location: | St. Catharines, Ontario, Canada |
| GPS Coordinates: | 43°11'30"N by 79°10'15"W |
| Operator/Owner: | Niagara District Airport Commission |
| Airport Type: | Public |
| Elevation: | 321 feet (98 meters) |
| # of Runways: | 3 |
| View all routes: | Routes from YCM |
| More Information: | YCM Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- After returning from combat duty in France, a cadre of the 135th Aero Squadron ) was assigned to Post Field as an observation squadron, supplying aircraft for the United States Army Field Artillery School at Fort Sill and supported Army units at Fort Leavenworth, Kansas.
- There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
- Although the Signal corps had been supplying Observation aircraft for the United States Army Field Artillery School since 1915.
- 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.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
- 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 St. Catharines/Niagara District Airport (YCM):
- Because of St. Catharines/Niagara District Airport's relatively low elevation of 321 feet, planes can take off or land at St. Catharines/Niagara District 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 1929, the facilities were described by the S.C.F.C.
- By arrangement of a grant by the City of St.
- The closest airport to St. Catharines/Niagara District Airport (YCM) is Niagara Falls International Airport (IAG), which is located only 13 miles (21 kilometers) ESE of YCM.
- The furthest airport from St. Catharines/Niagara District Airport (YCM) is Margaret River Airport (MGV), which is located 11,437 miles (18,406 kilometers) away in Margaret River, Western Australia, Australia.
- St. Catharines/Niagara District Airport (YCM) has 3 runways.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 5.72 miles (9.20 km) S | Lawton–Fort Sill Regional Airport (LAW) | Lawton, Oklahoma, United States |     |
| 2 | 28.03 miles (45.12 km) ESE | Halliburton Field (DUC) | Duncan, Oklahoma, United States | |
| 3 | 38.98 miles (62.73 km) WSW | Frederick Regional Airport (FDR) | Frederick, Oklahoma, United States | |
| 4 | 39.53 miles (63.61 km) NE | Chickasha Municipal Airport (CHK) | Chickasha, Oklahoma, United States | |
| 5 | 43.74 miles (70.39 km) WNW | Hobart Regional Airport (HBR) | Hobart, Oklahoma, United States | |
| 6 | 45.95 miles (73.94 km) S | Sheppard Air Force Base (SPS) | Wichita Falls, Texas, United States | |
| 7 | 49.22 miles (79.21 km) W | Altus Air Force Base (LTS) | Altus, Oklahoma, United States | |
| 8 | 53.30 miles (85.78 km) W | Altus/Quartz Mountain Regional Airport (AXS) | Altus, Oklahoma, United States | |
| 9 | 54.76 miles (88.12 km) S | Kickapoo Downtown Airport (KIP) | Wichita Falls, Texas, United States | |
| 10 | 65.69 miles (105.71 km) NW | Clinton-Sherman Industrial Airpark (CSM) | Clinton, Oklahoma, United States | |
| 11 | 66.85 miles (107.58 km) NE | University of Oklahoma Max Westheimer Airport (OUN) | Norman, Oklahoma, United States | |
| 12 | 68.33 miles (109.96 km) NNW | Clinton Regional Airport (CLK) | Clinton, Oklahoma, United States | |
| 13 | 68.51 miles (110.26 km) NE | Will Rogers World Airport (OKC) | Oklahoma City, Oklahoma, United States | |
| 14 | 74.55 miles (119.97 km) NE | Wiley Post Airport (PWA) | Oklahoma City, Oklahoma, United States | |
| 15 | 78.07 miles (125.64 km) NE | Tinker Air Force Base (TIK) | Oklahoma City, Oklahoma, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,920.33 miles (17,574.52 km) SE | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 2 | 10,680.39 miles (17,188.37 km) ESE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 3 | 10,614.31 miles (17,082.03 km) SW | Cocos (Keeling) Island Airport (CCK) | Cocos Islands, Australia | |
| 4 | 10,601.93 miles (17,062.12 km) ESE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 5 | 10,589.08 miles (17,041.43 km) ESE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 6 | 10,532.55 miles (16,950.46 km) W | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 7 | 10,512.35 miles (16,917.95 km) W | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 8 | 10,492.35 miles (16,885.76 km) W | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 9 | 10,478.49 miles (16,863.45 km) W | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 10 | 10,478.05 miles (16,862.75 km) W | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 11 | 10,472.77 miles (16,854.25 km) W | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 12 | 10,460.30 miles (16,834.17 km) W | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 13 | 10,458.62 miles (16,831.48 km) W | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 14 | 10,456.31 miles (16,827.76 km) W | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 15 | 10,452.67 miles (16,821.90 km) W | Perth Airport (PER) | Perth, Western Australia, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 12.75 miles (20.53 km) ESE | Niagara Falls International Airport (IAG) | Niagara Falls, New York, United States | |
| 2 | 28.14 miles (45.29 km) SE | Buffalo Niagara International Airport (BUF) | Buffalo, New York, United States | |
| 3 | 32.16 miles (51.76 km) NNW | Billy Bishop Toronto City Airport (YTZ) | Toronto, Ontario, Canada | |
| 4 | 38.51 miles (61.97 km) W | John C. Munro Hamilton International Airport (YHM) | Hamilton, Ontario, Canada | |
| 5 | 40.67 miles (65.46 km) NW | Toronto Pearson International Airport (YYZ) | Mississauga, Ontario, Canada | |
| 6 | 47.28 miles (76.09 km) NNW | Buttonville Airport (YKZ) | Buttonville, Ontario, Canada | |
| 7 | 48.52 miles (78.09 km) S | Chautauqua County/Dunkirk Airport (DKK) | Dunkirk, New York, United States | |
| 8 | 52.35 miles (84.25 km) NNE | Oshawa Municipal Airport (YOO) | Oshawa, Ontario, Canada | |
| 9 | 63.48 miles (102.16 km) WNW | Region of Waterloo International Airport (YKF) | Waterloo Regional Municipality, Ontario, Canada | |
| 10 | 71.88 miles (115.68 km) S | Chautauqua County/Jamestown Airport (JHW) | Jamestown, New York, United States | |
| 11 | 75.70 miles (121.83 km) E | Greater Rochester International Airport (ROC) | Rochester, New York, United States | |
| 12 | 77.21 miles (124.26 km) SSE | Cattaraugus County-Olean Airport (OLE) | Olean, New York, United States | |
| 13 | 82.34 miles (132.51 km) NNE | Peterborough Airport (YPQ) | Peterborough, Ontario, Canada | |
| 14 | 83.30 miles (134.05 km) NNW | Canadian Forces Base Borden (YBN) | Borden, Ontario, Canada | |
| 15 | 85.38 miles (137.40 km) ESE | Dansville Municipal Airport (DSV) | Dansville, New York, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,437.29 miles (18,406.49 km) SW | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 11,413.24 miles (18,367.78 km) SW | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 3 | 11,409.24 miles (18,361.35 km) WSW | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 4 | 11,386.91 miles (18,325.41 km) SW | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 5 | 11,365.44 miles (18,290.86 km) WSW | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 6 | 11,323.84 miles (18,223.90 km) SW | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 7 | 11,318.14 miles (18,214.74 km) WSW | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 8 | 11,315.04 miles (18,209.75 km) SW | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 9 | 11,303.64 miles (18,191.39 km) SW | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 10 | 11,251.41 miles (18,107.34 km) SW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 11 | 11,179.02 miles (17,990.85 km) SW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 12 | 11,155.70 miles (17,953.31 km) SW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 13 | 11,132.86 miles (17,916.56 km) SW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 14 | 11,129.82 miles (17,911.66 km) WSW | Esperance Airport (EPR) | Esperance, Australia | |
| 15 | 11,129.58 miles (17,911.27 km) SW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |