Nonstop flight route between Fort Sill, Oklahoma, United States and Ephrata, Washington, United States:
Departure Airport:
(34°38'58"N by 98°24'7"W)
Arrival Airport:
(47°18'29"N by 119°31'0"W)
Distance from FSI to EPH:
1,398.54 miles (2,250.72 km)
Share this route:
Jump to:
- About this route
- FSI Airport Information
- EPH Airport Information
- Facts about FSI
- Facts about EPH
- 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 EPH
- List of Nearest Airports to EPH
- Map of Furthest Airports from EPH
- List of Furthest Airports from EPH
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Ephrata Municipal Airport (EPH), Ephrata, Washington, United States would travel a Great Circle distance of 1,399 miles (or 2,251 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 Ephrata Municipal 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: | EPH / KEPH |
| Airport Names: |
|
| Location: | Ephrata, Washington, United States |
| GPS Coordinates: | 47°18'29"N by 119°31'0"W |
| Area Served: | Ephrata, Washington |
| Airport Type: | Public |
| Elevation: | 1276 feet (389 meters) |
| # of Runways: | 3 |
| View all routes: | Routes from EPH |
| More Information: | EPH Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- With the end of World War I, in October 1919 Post Field was deactivated as an active duty airfield in accordance with sharply reduced military budgets, and a small caretaker unit was assigned to the facility for administrative reasons to support the balloon school/company.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- 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 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 Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- Although the Signal corps had been supplying Observation aircraft for the United States Army Field Artillery School since 1915.
- Post Field served as a base for flight training for the Air Service.
- 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.
Facts about Ephrata Municipal Airport (EPH):
- The furthest airport from Ephrata Municipal Airport (EPH) is Tôlanaro Airport (FTU), which is located 10,729 miles (17,266 kilometers) away in Tôlanaro, Madagascar.
- Ephrata Municipal Airport (EPH) has 3 runways.
- The closest airport to Ephrata Municipal Airport (EPH) is Grant County International Airport (MWH), which is located only 12 miles (19 kilometers) SE of EPH.
- In addition to being known as "Ephrata Municipal Airport", another name for EPH is "Ephrata Army Airfield".
- The airfield was established in 1939 as Ephrata Army Air Base.
| 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 | 11.54 miles (18.58 km) SE | Grant County International Airport (MWH) | Moses Lake, Washington, United States | |
| 2 | 32.84 miles (52.85 km) W | Pangborn Memorial Airport (EAT) | Wenatchee, Washington, United States | |
| 3 | 51.26 miles (82.50 km) WSW | Bowers Field (ELN) | Ellensburg, Washington, United States | |
| 4 | 62.57 miles (100.70 km) SW | Vagabond Army Heliport (closed to fixed-wing aircraft) (FCT) | Yakima, Washington, United States | |
| 5 | 69.99 miles (112.64 km) S | Richland Airport (RLD) | Richland, Washington, United States | |
| 6 | 70.44 miles (113.37 km) SW | Yakima Air Terminal (YKM) | Yakima, Washington, United States | |
| 7 | 74.51 miles (119.91 km) SSE | Tri-Cities Airport (PSC) | Pasco, Washington, United States | |
| 8 | 78.30 miles (126.01 km) W | Easton State Airport (ESW) | Easton, Washington, United States | |
| 9 | 79.88 miles (128.55 km) N | Omak Airport (OMK) | Omak, Washington, United States | |
| 10 | 89.50 miles (144.03 km) ENE | Fairchild Air Force Base (SKA) | Spokane, Washington, United States | |
| 11 | 95.10 miles (153.05 km) ENE | Spokane International Airport (GEG) | Spokane, Washington, United States | |
| 12 | 102.05 miles (164.23 km) SE | Walla Walla Regional AirportWalla Walla Army Air Base (ALW) | Walla Walla, Washington, United States | |
| 13 | 102.97 miles (165.71 km) S | Hermiston Municipal Airport (HES) | Hermiston, Oregon, United States | |
| 14 | 105.66 miles (170.05 km) ENE | Felts Field (SFF) | Spokane, Washington, United States | |
| 15 | 115.99 miles (186.67 km) SSE | Eastern Oregon Regional Airport (PDT) | Pendleton, Oregon, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,728.85 miles (17,266.36 km) SSE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 2 | 10,651.52 miles (17,141.92 km) SE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 3 | 10,619.22 miles (17,089.94 km) S | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 4 | 10,590.44 miles (17,043.61 km) S | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 5 | 10,573.07 miles (17,015.67 km) S | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 6 | 10,526.36 miles (16,940.50 km) S | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 7 | 10,510.04 miles (16,914.23 km) SSE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 8 | 10,500.14 miles (16,898.30 km) SSE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 9 | 10,480.64 miles (16,866.92 km) ESE | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 10 | 10,471.20 miles (16,851.71 km) ESE | East London Airport (ELS) | East London, South Africa | |
| 11 | 10,451.95 miles (16,820.74 km) ESE | King Shaka International (DUR) | Durban, KwaZulu-Natal, South Africa | |
| 12 | 10,451.77 miles (16,820.45 km) ESE | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 13 | 10,450.27 miles (16,818.04 km) SE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 14 | 10,448.03 miles (16,814.43 km) ESE | Richards Bay Airport (RCB) | Richards Bay, KwaZulu-Natal, South Africa | |
| 15 | 10,441.27 miles (16,803.55 km) ESE | Mthatha Airport (UTT) | Mthatha, South Africa | |