Nonstop flight route between Houston, Texas, United States and St. Mary's, Alaska, United States:
Departure Airport:
(29°49'5"N by 95°40'20"W)
Arrival Airport:
(62°3'38"N by 163°18'6"W)
Distance from IWS to KSM:
3,700.51 miles (5,955.37 km)
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Jump to:
- About this route
- IWS Airport Information
- KSM Airport Information
- Facts about IWS
- Facts about KSM
- Map of Nearest Airports to IWS
- List of Nearest Airports to IWS
- Map of Furthest Airports from IWS
- List of Furthest Airports from IWS
- Map of Nearest Airports to KSM
- List of Nearest Airports to KSM
- Map of Furthest Airports from KSM
- List of Furthest Airports from KSM
About this route:
A direct, nonstop flight between West Houston Airport (IWS), Houston, Texas, United States and St. Mary's Airport (KSM), St. Mary's, Alaska, United States would travel a Great Circle distance of 3,701 miles (or 5,955 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 West Houston Airport and St. Mary's 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 West Houston Airport and St. Mary's Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
| IATA / ICAO Codes: | IWS / KIWS |
| Airport Name: | West Houston Airport |
| Location: | Houston, Texas, United States |
| GPS Coordinates: | 29°49'5"N by 95°40'20"W |
| Area Served: | Houston, Texas |
| Operator/Owner: | West Houston Airport Corp. |
| Airport Type: | Public use |
| Elevation: | 111 feet (34 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from IWS |
| More Information: | IWS Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | KSM / PASM |
| Airport Name: | St. Mary's Airport |
| Location: | St. Mary's, Alaska, United States |
| GPS Coordinates: | 62°3'38"N by 163°18'6"W |
| Operator/Owner: | Alaska DOT&PF |
| Airport Type: | Public |
| Elevation: | 312 feet (95 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from KSM |
| More Information: | KSM Maps & Info |
Facts about West Houston Airport (IWS):
- Because of West Houston Airport's relatively low elevation of 111 feet, planes can take off or land at West Houston 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.
- West Houston Airport (IWS) currently has only 1 runway.
- The closest airport to West Houston Airport (IWS) is Andrau Airpark (AAP), which is located only 9 miles (14 kilometers) SE of IWS.
- Landing at the airport is free, except for helicopters, where the fee is waived if the customer buys gasoline.
- The furthest airport from West Houston Airport (IWS) is Cocos (Keeling) Island Airport (CCK), which is located 10,979 miles (17,668 kilometers) away in Cocos Islands, Australia.
- This airport is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a general aviation reliever airport.Houston Air Route Traffic Control Center in Houston is the airport's designated ARTCC.
Facts about St. Mary's Airport (KSM):
- The furthest airport from St. Mary's Airport (KSM) is Cape Town International Airport (CPT), which is located 10,494 miles (16,889 kilometers) away in Cape Town, South Africa.
- St. Mary's Airport (KSM) has 2 runways.
- Because of St. Mary's Airport's relatively low elevation of 312 feet, planes can take off or land at St. Mary's 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 St. Mary's Airport (KSM) is Mountain Village Airport (MOU), which is located only 13 miles (20 kilometers) W of KSM.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 8.83 miles (14.21 km) SE | Andrau Airpark (AAP) | Houston, Texas, United States |     |
| 2 | 13.58 miles (21.86 km) S | Sugar Land Regional Airport (SGR) | Sugar Land, Texas (near Houston), United States | |
| 3 | 18.29 miles (29.44 km) NNE | David Wayne Hooks Memorial Airport (DWH) | Houston, Texas, United States | |
| 4 | 22.91 miles (36.88 km) ENE | George Bush Intercontinental Airport (IAH) | Houston, Texas, United States | |
| 5 | 26.46 miles (42.59 km) ESE | William P. Hobby Airport (HOU) | Houston, Texas, United States | |
| 6 | 34.10 miles (54.88 km) ESE | Ellington Field Joint Reserve BaseEllington Air Force BaseEllington Field (EFD) | Houston, Texas, United States | |
| 7 | 40.00 miles (64.38 km) NNE | Lone Star Executive Airport (CXO) | Houston, Texas, United States | |
| 8 | 43.21 miles (69.54 km) E | Baytown Airport (HPY) | Baytown, Texas, United States | |
| 9 | 48.56 miles (78.15 km) SW | Wharton Regional Airport (WHT) | Wharton, Texas, United States | |
| 10 | 50.64 miles (81.50 km) SSE | Texas Gulf Coast Regional Airport (LJN) | Angleton / Lake Jackson, Texas, United States | |
| 11 | 59.50 miles (95.76 km) S | Bay City Municipal Airport (BBC) | Bay City, Texas, United States | |
| 12 | 61.99 miles (99.76 km) SE | Scholes International Airport at Galveston (GLS) | Galveston, Texas, United States | |
| 13 | 64.36 miles (103.58 km) N | Bruce Brothers Huntsville Regional Airport (HTV) | Huntsville, Texas, United States | |
| 14 | 67.36 miles (108.40 km) NW | Easterwood Airport (CLL) | College Station, Texas, United States | |
| 15 | 73.41 miles (118.14 km) NNW | Coulter Field (CFD) | Bryan, Texas, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,978.58 miles (17,668.27 km) SW | Cocos (Keeling) Island Airport (CCK) | Cocos Islands, Australia | |
| 2 | 10,952.82 miles (17,626.82 km) ESE | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 3 | 10,653.72 miles (17,145.45 km) ESE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 4 | 10,634.50 miles (17,114.52 km) W | Shark Bay Airport (MJK) | Monkey Mia, Western Australia, Australia | |
| 5 | 10,622.80 miles (17,095.70 km) W | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 6 | 10,615.95 miles (17,084.67 km) WSW | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 7 | 10,610.33 miles (17,075.63 km) W | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 8 | 10,609.04 miles (17,073.55 km) W | Carnarvon Airport (CVQ) | Carnarvon, Western Australia, Australia | |
| 9 | 10,604.64 miles (17,066.48 km) W | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 10 | 10,598.75 miles (17,056.99 km) WSW | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 11 | 10,586.79 miles (17,037.74 km) WSW | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 12 | 10,582.60 miles (17,030.99 km) WSW | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 13 | 10,567.23 miles (17,006.26 km) WSW | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 14 | 10,561.50 miles (16,997.04 km) WSW | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 15 | 10,558.05 miles (16,991.49 km) W | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 12.52 miles (20.15 km) W | Mountain Village Airport (MOU) | Mountain Village, Alaska, United States | |
| 2 | 15.71 miles (25.28 km) ESE | Pilot Station Airport (PQS) | Pilot Station, Alaska, United States | |
| 3 | 43.61 miles (70.18 km) ESE | Marshall Don Hunter Sr. Airport (MLL) | Marshall, Alaska, United States | |
| 4 | 58.95 miles (94.87 km) WNW | Sheldon Point Airport (SXP) | Sheldon Point, Alaska, United States | |
| 5 | 61.02 miles (98.20 km) NW | Alakanuk Airport (AUK) | Alakanuk, Alaska, United States | |
| 6 | 62.90 miles (101.24 km) NW | Emmonak Airport (EMK) | Emmonak, Alaska, United States | |
| 7 | 67.40 miles (108.48 km) N | Kotlik Airport (KOT) | Kotlik, Alaska, United States | |
| 8 | 67.43 miles (108.52 km) ESE | Russian Mission Airport (RSH) | Russian Mission, Alaska, United States | |
| 9 | 75.21 miles (121.04 km) W | Scammon Bay Airport (SCM) | Scammon Bay, Alaska, United States | |
| 10 | 83.21 miles (133.91 km) WSW | Chevak Airport (VAK) | Chevak, Alaska, United States | |
| 11 | 84.72 miles (136.35 km) SSE | Nunapitchuk Airport (NUP) | Nunapitchuk, Alaska, United States | |
| 12 | 85.97 miles (138.35 km) SSE | Kasigluk Airport (KUK) | Kasigluk, Alaska, United States | |
| 13 | 88.49 miles (142.42 km) W | Cape Romanzof Air Force Station Cape Romanzof Long Range Radar Site (CZF) | Cape Romanzof, Alaska, United States | |
| 14 | 89.19 miles (143.53 km) SSW | Newtok Airport (WWT) | Newtok, Alaska, United States | |
| 15 | 89.22 miles (143.59 km) SSE | Atmautluak Airport (ATT) | Atmautluak, Alaska, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,494.08 miles (16,888.54 km) S | Cape Town International Airport (CPT) | Cape Town, South Africa | |
| 2 | 10,482.44 miles (16,869.80 km) S | George Airport (GRJ) | George, South Africa | |
| 3 | 10,457.83 miles (16,830.21 km) SSW | Port Elizabeth International Airport (PLZ) | Port Elizabeth, South Africa | |
| 4 | 10,416.76 miles (16,764.12 km) SSW | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 5 | 10,371.90 miles (16,691.92 km) SSW | East London Airport (ELS) | East London, South Africa | |
| 6 | 10,261.64 miles (16,514.46 km) SSW | Mthatha Airport (UTT) | Mthatha, South Africa | |
| 7 | 10,199.66 miles (16,414.71 km) S | Kleinsee Airport (KLZ) | Kleinzee, South Africa | |
| 8 | 10,195.75 miles (16,408.43 km) SSW | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 9 | 10,169.94 miles (16,366.89 km) S | Aggeneys Airport (AGZ) | Aggeneys, South Africa | |
| 10 | 10,169.94 miles (16,366.89 km) S | Wild Coast Sun Airport (MZF) | Mzamba, South Africa | |
| 11 | 10,157.43 miles (16,346.75 km) SSW | Mafeteng Airport (MFC) | Mafeteng, Lesotho | |
| 12 | 10,151.99 miles (16,338.00 km) SSW | Semonkong Airport (SOK) | Semonkong, Lesotho | |
| 13 | 10,149.37 miles (16,333.79 km) SSW | Lebakeng Airport (LEF) | Lebakeng, Lesotho | |
| 14 | 10,143.31 miles (16,324.03 km) SSW | Lesobeng Airport (LES) | Lesobeng, Lesotho | |
| 15 | 10,133.50 miles (16,308.25 km) SE | Teniente Rodolfo Marsh Airport (TNM) | Villa Las Estrellas, Antarctica | |