Nonstop flight route between Sion, Switzerland and Fort Sill, Oklahoma, United States:
Departure Airport:
(46°13'10"N by 7°19'36"E)
Arrival Airport:
(34°38'58"N by 98°24'7"W)
Distance from SIR to FSI:
5,192.74 miles (8,356.88 km)
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- About this route
- SIR Airport Information
- FSI Airport Information
- Facts about SIR
- Facts about FSI
- Map of Nearest Airports to SIR
- List of Nearest Airports to SIR
- Map of Furthest Airports from SIR
- List of Furthest Airports from SIR
- Map of Nearest Airports to FSI
- List of Nearest Airports to FSI
- Map of Furthest Airports from FSI
- List of Furthest Airports from FSI
About this route:
A direct, nonstop flight between Sion Airport (SIR), Sion, Switzerland and Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States would travel a Great Circle distance of 5,193 miles (or 8,357 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 Sion Airport and Henry Post Army Airfield, 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 Sion Airport and Henry Post Army Airfield. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
| IATA / ICAO Codes: | SIR / LSGS |
| Airport Names: |
|
| Location: | Sion, Switzerland |
| GPS Coordinates: | 46°13'10"N by 7°19'36"E |
| Area Served: | Sion, Switzerland |
| Elevation: | 1585 feet (483 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from SIR |
| More Information: | SIR Maps & Info |
Arrival 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 |
Facts about Sion Airport (SIR):
- The closest airport to Sion Airport (SIR) is Aosta Valley Airport (AOT), which is located 33 miles (54 kilometers) S of SIR.
- Sion Airport (SIR) has 2 runways.
- In addition to being known as "Sion Airport", other names for SIR include "Aéroport de Sion" and "LSGS /LSMS".
- The furthest airport from Sion Airport (SIR) is Chatham Islands (CHT), which is nearly antipodal to Sion Airport (meaning Sion Airport is almost on the exact opposite side of the Earth from Chatham Islands), and is located 12,188 miles (19,615 kilometers) away in Waitangi, Chatham Islands, New Zealand.
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 field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
- 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 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.
- With the sudden end of World War I in November 1918, the future operational status of Post Field was unknown.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- Henry Post Army Airfield (FSI) currently has only 1 runway.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 33.31 miles (53.61 km) S | Aosta Valley Airport (AOT) | Aosta, Italy |     |
| 2 | 40.64 miles (65.41 km) NW | Lausanne Airport (QLS) | Lausanne, Switzerland | |
| 3 | 42.49 miles (68.38 km) SW | Megève Aerodrome (MVV) | Megève, France | |
| 4 | 48.55 miles (78.14 km) N | Bern Airport (BRN) | Bern, Switzerland | |
| 5 | 50.66 miles (81.53 km) W | Annemasse Aerodrome (QNJ) | Annemasse, France | |
| 6 | 58.20 miles (93.66 km) W | Geneva International Airport (GVA) | Geneva, Switzerland | |
| 7 | 65.86 miles (106.00 km) SSW | Courchevel Airport (CVF) | Courchevel, France | |
| 8 | 66.71 miles (107.36 km) SSW | Méribel Airport (MFX) | Meribel, France | |
| 9 | 71.98 miles (115.84 km) SSE | Turin Airport (TRN) | Turin, Italy | |
| 10 | 75.96 miles (122.25 km) NE | Emmen Swiss Air Base (EML) | Emmen, Lucerne, Switzerland | |
| 11 | 77.30 miles (124.41 km) E | Lugano Airport (LUG) | Lugano, Agno, Switzerland | |
| 12 | 78.50 miles (126.34 km) ESE | Milan Malpensa Airport (MXP) | Milano, Italy | |
| 13 | 80.19 miles (129.05 km) WSW | Chambéry Airport (CMF) | Chambéry, France | |
| 14 | 90.13 miles (145.05 km) NW | Besançon - La Vèze Aerodrome (QBQ) | Besançon / La Vèze, France | |
| 15 | 91.13 miles (146.66 km) NNW | Montbéliard - Courcelles Aerodrome (XMF) | Montbéliard, France | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 12,188.10 miles (19,614.80 km) SE | Chatham Islands (CHT) | Waitangi, Chatham Islands, New Zealand | |
| 2 | 11,749.62 miles (18,909.14 km) ESE | Hood Aerodrome (MRO) | Masterton, New Zealand | |
| 3 | 11,732.10 miles (18,880.94 km) SE | Hawke's Bay Airport (NPE) | Napier, New Zealand | |
| 4 | 11,730.83 miles (18,878.89 km) SE | Gisborne Airport (GIS) | Gisborne, New Zealand | |
| 5 | 11,727.65 miles (18,873.78 km) ESE | Wellington International Airport (WLG) | Wellington, New Zealand | |
| 6 | 11,721.62 miles (18,864.07 km) ESE | Palmerston North Airport (PMR) | Palmerston North, New Zealand | |
| 7 | 11,719.38 miles (18,860.46 km) ESE | Kapiti Coast Airport (PPQ) | Paraparaumu Beach, New Zealand | |
| 8 | 11,710.67 miles (18,846.45 km) ESE | Kaikoura Aerodrome (KBZ) | Kaikoura, New Zealand | |
| 9 | 11,693.26 miles (18,818.43 km) ESE | Woodbourne Airport (BHE) | Blenheim, New Zealand | |
| 10 | 11,689.24 miles (18,811.97 km) E | Christchurch International Airport (CHC) | Christchurch, New Zealand | |
| 11 | 11,681.75 miles (18,799.91 km) ESE | Wanganui Airport (WAG) | Wanganui, New Zealand | |
| 12 | 11,666.63 miles (18,775.57 km) SE | Taupo AirportTe Papa Waka Rererangi o Taupō (TUO) | Taupo, New Zealand | |
| 13 | 11,663.50 miles (18,770.54 km) E | Ashburton Aerodrome (ASG) | Ashburton, New Zealand | |
| 14 | 11,656.56 miles (18,759.37 km) ESE | Nelson AirportTe Papa Waka Rererangi o Whakatū (NSN) | Nelson, New Zealand | |
| 15 | 11,654.53 miles (18,756.10 km) SE | Whakatane Airport (WHK) | Whakatane, New Zealand | |
| 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 | |