Nonstop flight route between Fort Sill, Oklahoma, United States and Chiang Mai, Thailand:
Departure Airport:
(34°38'58"N by 98°24'7"W)
Arrival Airport:
(18°46'0"N by 98°57'45"E)
Distance from FSI to CNX:
8,573.80 miles (13,798.15 km)
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Jump to:
- About this route
- FSI Airport Information
- CNX Airport Information
- Facts about FSI
- Facts about CNX
- 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 CNX
- List of Nearest Airports to CNX
- Map of Furthest Airports from CNX
- List of Furthest Airports from CNX
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Chiang Mai International Airport (CNX), Chiang Mai, Thailand would travel a Great Circle distance of 8,574 miles (or 13,798 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 Henry Post Army Airfield and Chiang Mai International Airport, 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 Henry Post Army Airfield and Chiang Mai International Airport. You'll see that it will travel the same route of the red line on this map!
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: | CNX / VTCC |
| Airport Names: |
|
| Location: | Chiang Mai, Thailand |
| GPS Coordinates: | 18°46'0"N by 98°57'45"E |
| Area Served: | Chiang Mai Lamphun |
| Operator/Owner: | Royal Thai Air Force |
| Airport Type: | Public / Military |
| Elevation: | 1036 feet (316 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from CNX |
| More Information: | CNX Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- Although the Signal corps had been supplying Observation aircraft for the United States Army Field Artillery School since 1915.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- 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.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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.
Facts about Chiang Mai International Airport (CNX):
- In addition to being known as "Chiang Mai International Airport", another name for CNX is "ท่าอากาศยานเชียงใหม่".
- Chiang Mai International Airport (CNX) currently has only 1 runway.
- It is the major gateway to the north of Thailand, and currently the fourth busiest airport in the country.
- There are two terminals, one for domestic passengers and the other for international flights.
- The furthest airport from Chiang Mai International Airport (CNX) is Capitán FAP Renán Elías Olivera International Airport (PIO), which is located 11,965 miles (19,256 kilometers) away in Pisco, Peru.
- Chiang Mai International Airport handled 5,463,921 passengers last year.
- The closest airport to Chiang Mai International Airport (CNX) is Lampang Airport (LPT), which is located 49 miles (79 kilometers) SE of CNX.
| 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 | 49.32 miles (79.37 km) SE | Lampang Airport (LPT) | Lampang, Thailand | |
| 2 | 53.42 miles (85.97 km) NW | Pai Airport (PYY) | Pai, Thailand | |
| 3 | 74.34 miles (119.63 km) WNW | Mae Hong Son Airport (HGN) | Mae Hong Son, Thailand | |
| 4 | 90.19 miles (145.14 km) ESE | Phrae Airport (PRH) | Phrae, Thailand | |
| 5 | 101.53 miles (163.40 km) NE | Chiang Rai International Airport (CEI) | Chiang Rai, Thailand | |
| 6 | 119.66 miles (192.58 km) SSE | Sukhothai Airport (THS) | Sukhothai, Thailand | |
| 7 | 130.66 miles (210.27 km) S | Tak Airport (TKT) | Tak, Thailand | |
| 8 | 130.70 miles (210.34 km) WNW | Loikaw Airport (LIW) | Loikaw, Myanmar (Burma) | |
| 9 | 134.46 miles (216.40 km) NNE | Tachilek Airport (THL) | Tachilek, Myanmar (Burma) | |
| 10 | 140.83 miles (226.65 km) NE | Ban Huoeisay Airport (HOE) | Houeisay, Laos | |
| 11 | 145.43 miles (234.05 km) S | Mae Sot Airport (MAQ) | Mae Sot, Tak Province, Thailand | |
| 12 | 180.53 miles (290.53 km) NNE | Kengtung Airport (KET) | Kengtung, Myanmar (Burma) | |
| 13 | 181.90 miles (292.73 km) SSW | Mawlamyaing Airport (MNU) | Mawlamyaing (Maulmyine), Myanmar (Burma) | |
| 14 | 183.84 miles (295.86 km) E | Sayaboury Airport (ZBY) | Sayaboury, Laos | |
| 15 | 189.64 miles (305.19 km) WNW | Naypyitaw International Airport (NYT) | Naypyidaw, Myanmar | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,965.21 miles (19,256.09 km) SW | Capitán FAP Renán Elías Olivera International Airport (PIO) | Pisco, Peru | |
| 2 | 11,952.54 miles (19,235.70 km) WSW | Maria Reiche Neuman Airport (NZC) | Nazca, Ica Region, Peru | |
| 3 | 11,902.60 miles (19,155.33 km) SSW | Jorge Chávez International Airport (LIM) | Callao (near Lima), Peru | |
| 4 | 11,839.99 miles (19,054.56 km) SW | Coronel FAP Alfredo Mendívil Duarte Airport (AYP) | Ayacucho, Peru | |
| 5 | 11,839.99 miles (19,054.56 km) SW | Coronel FAP Alfredo Mendívil Duarte Airport (AYC) | Ayacucho, Peru | |
| 6 | 11,828.40 miles (19,035.91 km) SW | Jauja AirportFrancisco Carle Airport (JAU) | Jauja, Peru | |
| 7 | 11,819.09 miles (19,020.93 km) WSW | Andahuaylas Airport (ANS) | Andahuaylas, Peru | |
| 8 | 11,796.45 miles (18,984.49 km) W | Ilo Airport (ILQ) | Ilo, Moquegua Region, Peru | |
| 9 | 11,791.95 miles (18,977.25 km) WSW | Rodríguez Ballón International Airport (AQP) | Arequipa, Peru | |
| 10 | 11,751.35 miles (18,911.91 km) SSW | Teniente FAP Jaime Montreuil Morales Airport (CHM) | Chimbote, Ancash Region, Peru | |
| 11 | 11,746.47 miles (18,904.06 km) SSW | Comandante FAP Germán Arias Graziani Airport (ATA) | Huaraz, Peru | |
| 12 | 11,742.88 miles (18,898.28 km) SSW | Alf. FAP David Figueroa Fernandini (HUU) | Huánuco, Huánuco Region, Peru | |
| 13 | 11,735.52 miles (18,886.45 km) W | Chacalluta International Airport (ARI) | Arica, Chile | |
| 14 | 11,735.52 miles (18,886.45 km) W | Chacalluta International Airport (ACM) | Arica, Amazonas, Colombia | |
| 15 | 11,733.59 miles (18,883.33 km) WSW | Alejandro Velasco Astete International Airport (CUZ) | Cusco, Cusco Region, Peru | |