Nonstop flight route between Fort Sill, Oklahoma, United States and Lansdowne House, Ontario, Canada:
Departure Airport:
(34°38'58"N by 98°24'7"W)
Arrival Airport:
(52°11'44"N by 87°56'3"W)
Distance from FSI to YLH:
1,318.05 miles (2,121.20 km)
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- About this route
- FSI Airport Information
- YLH Airport Information
- Facts about FSI
- Facts about YLH
- 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 YLH
- List of Nearest Airports to YLH
- Map of Furthest Airports from YLH
- List of Furthest Airports from YLH
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Lansdowne House Airport (YLH), Lansdowne House, Ontario, Canada would travel a Great Circle distance of 1,318 miles (or 2,121 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 Lansdowne House 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: | YLH / CYLH |
| Airport Name: | Lansdowne House Airport |
| Location: | Lansdowne House, Ontario, Canada |
| GPS Coordinates: | 52°11'44"N by 87°56'3"W |
| Operator/Owner: | Government of Ontario |
| Airport Type: | Public |
| Elevation: | 834 feet (254 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from YLH |
| More Information: | YLH Maps & Info |
Facts about Henry Post Army Airfield (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.
- The Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- Henry Post Army Airfield is a military use airport located at Fort Sill in Comanche County, Oklahoma, United States.
- 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.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- In 1940 the Artillery decided that the Air Corps had outgrown such mundane chores as artillery spotting, and it was decided that it would take care of itself with its own observation aircraft.
- As a result of the United State's entry into World War I, Fort Sill was selected for a primary pilot school.
Facts about Lansdowne House Airport (YLH):
- Because of Lansdowne House Airport's relatively low elevation of 834 feet, planes can take off or land at Lansdowne House 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 closest airport to Lansdowne House Airport (YLH) is Fort Hope Airport (YFH), which is located 44 miles (70 kilometers) S of YLH.
- The furthest airport from Lansdowne House Airport (YLH) is Margaret River Airport (MGV), which is located 10,735 miles (17,277 kilometers) away in Margaret River, Western Australia, Australia.
- Lansdowne House Airport (YLH) currently has only 1 runway.
| 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 | 43.79 miles (70.48 km) S | Fort Hope Airport (YFH) | Fort Hope, Ontario, Canada | |
| 2 | 57.76 miles (92.96 km) NNE | Webequie Airport (YWP) | Webequie, Ontario, Canada | |
| 3 | 94.23 miles (151.65 km) ESE | Ogoki Post Airport (YOG) | Ogoki Post, Ontario, Canada | |
| 4 | 96.48 miles (155.27 km) NNW | Kasabonika Airport (XKS) | Kasabonika First Nation, Ontario, Canada | |
| 5 | 98.40 miles (158.37 km) NW | Kingfisher Lake Airport (KIF) | Kingfisher Lake, Ontario, Canada | |
| 6 | 110.27 miles (177.46 km) WSW | Pickle Lake Airport (YPL) | Pickle Lake, Ontario, Canada | |
| 7 | 138.24 miles (222.47 km) SSW | Armstrong Airport (YYW) | Armstrong, Thunder Bay District, Ontario, Canada | |
| 8 | 138.63 miles (223.10 km) NW | Big Trout Lake Airport (YTL) | Big Trout Lake, Ontario, Canada | |
| 9 | 149.00 miles (239.79 km) SSE | Nakina Airport (YQN) | Nakina, Ontario, Canada | |
| 10 | 150.98 miles (242.97 km) WNW | Round Lake (Weagamow Lake) Airport (ZRJ) | Round Lake, Ontario, Canada | |
| 11 | 168.74 miles (271.55 km) W | Cat Lake Airport (YAC) | Cat Lake, Ontario, Canada | |
| 12 | 172.51 miles (277.63 km) SSE | Geraldton (Greenstone Regional) Airport (YGQ) | Geraldton, Ontario, Canada | |
| 13 | 177.27 miles (285.29 km) NW | Bearskin Lake Airport (XBE) | Bearskin Lake, Ontario, Canada | |
| 14 | 181.53 miles (292.15 km) WNW | Muskrat Dam Airport (MSA) | Muskrat Dam, Ontario, Canada | |
| 15 | 212.24 miles (341.57 km) NW | Sachigo Lake Airport (ZPB) | Sachigo Lake, Ontario, Canada | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,735.47 miles (17,277.03 km) SW | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 10,719.42 miles (17,251.19 km) SW | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 3 | 10,711.84 miles (17,238.99 km) SW | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 4 | 10,698.55 miles (17,217.61 km) WSW | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 5 | 10,685.20 miles (17,196.12 km) SW | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 6 | 10,636.14 miles (17,117.16 km) SW | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 7 | 10,611.23 miles (17,077.08 km) SW | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 8 | 10,605.44 miles (17,067.76 km) SW | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 9 | 10,593.61 miles (17,048.72 km) SW | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 10 | 10,526.85 miles (16,941.29 km) SW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 11 | 10,485.87 miles (16,875.34 km) WSW | Esperance Airport (EPR) | Esperance, Australia | |
| 12 | 10,447.34 miles (16,813.32 km) SW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 13 | 10,431.73 miles (16,788.19 km) SW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 14 | 10,403.74 miles (16,743.15 km) SW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 15 | 10,393.44 miles (16,726.57 km) SW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |