Nonstop flight route between Fort Sill, Oklahoma, United States and Sioux Lookout, Ontario, Canada:
Departure Airport:
(34°38'58"N by 98°24'7"W)
Arrival Airport:
(50°6'51"N by 91°54'20"W)
Distance from FSI to YXL:
1,117.68 miles (1,798.73 km)
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- About this route
- FSI Airport Information
- YXL Airport Information
- Facts about FSI
- Facts about YXL
- 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 YXL
- List of Nearest Airports to YXL
- Map of Furthest Airports from YXL
- List of Furthest Airports from YXL
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Sioux Lookout Airport (YXL), Sioux Lookout, Ontario, Canada would travel a Great Circle distance of 1,118 miles (or 1,799 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 Sioux Lookout 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: | YXL / CYXL |
| Airport Name: | Sioux Lookout Airport |
| Location: | Sioux Lookout, Ontario, Canada |
| GPS Coordinates: | 50°6'51"N by 91°54'20"W |
| Operator/Owner: | Municipality of Sioux Lookout |
| Airport Type: | Public |
| Elevation: | 1257 feet (383 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from YXL |
| More Information: | YXL Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- 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.
- The first Army aviation at Fort Sill began on 26 July 1915 when eight Curtiss JN-3 airplanes of the 1st Aero Squadron arrived from Rockwell Field, California.
- 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.
- 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.
- 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.
Facts about Sioux Lookout Airport (YXL):
- The closest airport to Sioux Lookout Airport (YXL) is Dryden Regional Airport (YHD), which is located 42 miles (68 kilometers) WSW of YXL.
- Sioux Lookout Airport (YXL) currently has only 1 runway.
- The furthest airport from Sioux Lookout Airport (YXL) is Margaret River Airport (MGV), which is located 10,673 miles (17,176 kilometers) away in Margaret River, Western Australia, Australia.
| 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 | 42.07 miles (67.70 km) WSW | Dryden Regional Airport (YHD) | Dryden, Ontario, Canada | |
| 2 | 48.03 miles (77.29 km) S | Ignace Municipal Airport (ZUC) | Ignace, Ontario, Canada | |
| 3 | 93.38 miles (150.28 km) S | Atikokan Municipal Aerodrome (YIB) | Atikokan, Ontario, Canada | |
| 4 | 105.78 miles (170.24 km) NW | Red Lake Airport (YRL) | Red Lake, Ontario, Canada | |
| 5 | 111.51 miles (179.45 km) N | Cat Lake Airport (YAC) | Cat Lake, Ontario, Canada | |
| 6 | 111.54 miles (179.51 km) W | Kenora Airport (YQK) | Kenora, Ontario, Canada | |
| 7 | 118.03 miles (189.95 km) NE | Pickle Lake Airport (YPL) | Pickle Lake, Ontario, Canada | |
| 8 | 122.22 miles (196.69 km) SW | Fort Frances Municipal Airport (YAG) | Fort Frances, Ontario, Canada | |
| 9 | 126.44 miles (203.48 km) SSW | Falls International Airport (INL) | International Falls, Minnesota, United States | |
| 10 | 133.04 miles (214.11 km) E | Armstrong Airport (YYW) | Armstrong, Thunder Bay District, Ontario, Canada | |
| 11 | 148.25 miles (238.59 km) NW | Pikangikum Airport (YPM) | Pikangikum, Ontario, Canada | |
| 12 | 154.80 miles (249.12 km) SW | Baudette International Airport (BDE) | Baudette, Minnesota, United States | |
| 13 | 158.24 miles (254.66 km) S | Ely Municipal Airport (LYU) | Ely, Minnesota, United States | |
| 14 | 167.54 miles (269.62 km) SE | Thunder Bay International Airport (YQT) | Thunder Bay, Ontario, Canada | |
| 15 | 169.37 miles (272.58 km) NNW | North Spirit Lake Airport (YNO) | North Spirit Lake, Ontario, Canada | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,672.81 miles (17,176.18 km) WSW | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 10,649.05 miles (17,137.94 km) WSW | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 3 | 10,648.79 miles (17,137.53 km) WSW | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 4 | 10,622.27 miles (17,094.84 km) WSW | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 5 | 10,615.57 miles (17,084.06 km) WSW | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 6 | 10,560.77 miles (16,995.86 km) WSW | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 7 | 10,556.22 miles (16,988.55 km) WSW | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 8 | 10,548.03 miles (16,975.37 km) WSW | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 9 | 10,536.51 miles (16,956.83 km) WSW | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 10 | 10,482.87 miles (16,870.50 km) SW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 11 | 10,412.11 miles (16,756.63 km) SW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 12 | 10,390.49 miles (16,721.84 km) WSW | Esperance Airport (EPR) | Esperance, Australia | |
| 13 | 10,387.16 miles (16,716.47 km) SW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 14 | 10,365.45 miles (16,681.54 km) SW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 15 | 10,365.18 miles (16,681.10 km) SW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |