Nonstop flight route between West Chicago, Illinois, United States and St. Mary's, Alaska, United States:
Departure Airport:
(41°54'24"N by 88°14'53"W)
Arrival Airport:
(62°3'38"N by 163°18'6"W)
Distance from DPA to KSM:
3,258.15 miles (5,243.47 km)
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Jump to:
- About this route
- DPA Airport Information
- KSM Airport Information
- Facts about DPA
- Facts about KSM
- Map of Nearest Airports to DPA
- List of Nearest Airports to DPA
- Map of Furthest Airports from DPA
- List of Furthest Airports from DPA
- 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 DuPage Airport (DPA), West Chicago, Illinois, United States and St. Mary's Airport (KSM), St. Mary's, Alaska, United States would travel a Great Circle distance of 3,258 miles (or 5,243 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 DuPage 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 DuPage 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: | DPA / KDPA |
| Airport Name: | DuPage Airport |
| Location: | West Chicago, Illinois, United States |
| GPS Coordinates: | 41°54'24"N by 88°14'53"W |
| Airport Type: | Public |
| Elevation: | 759 feet (231 meters) |
| # of Runways: | 4 |
| View all routes: | Routes from DPA |
| More Information: | DPA 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 DuPage Airport (DPA):
- The closest airport to DuPage Airport (DPA) is Chicago/Aurora Municipal Airport (AUZ), which is located only 15 miles (24 kilometers) SW of DPA.
- The furthest airport from DuPage Airport (DPA) is Margaret River Airport (MGV), which is located 11,056 miles (17,792 kilometers) away in Margaret River, Western Australia, Australia.
- Because of DuPage Airport's relatively low elevation of 759 feet, planes can take off or land at DuPage 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.
- During the summer of 2012, runway 2R/20L was extended 1,343 feet to a total length of 6,443 feet.
- A year after the Navy began operations, Howard Aircraft Corporation opened a factory east of the airport across the road.
- DuPage Airport (DPA) has 4 runways.
Facts about St. Mary's Airport (KSM):
- 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 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.
- 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 | 14.96 miles (24.08 km) SW | Chicago/Aurora Municipal Airport (AUZ) | Aurora, Illinois, United States |     |
| 2 | 18.34 miles (29.52 km) ENE | Chicago O'Hare International Airport (ORD) | Chicago, Illinois, United States | |
| 3 | 22.15 miles (35.64 km) SSE | Lewis University Airport (LOT) | Chicago / Romeoville, Illinois, United States | |
| 4 | 22.84 miles (36.76 km) NE | Chicago Executive Airport (PWK) | Chicago/Prospect Heights/Wheeling, Illinois, United States | |
| 5 | 26.85 miles (43.21 km) ESE | Chicago Midway International Airport (MDW) | Chicago, Illinois, United States | |
| 6 | 27.15 miles (43.69 km) S | Joliet Regional Airport (JOT) | Joliet, Illinois, United States | |
| 7 | 40.59 miles (65.32 km) NNE | Waukegan National Airport (UGN) | Chicago / Waukegan, Illinois, United States | |
| 8 | 47.51 miles (76.46 km) ESE | Gary/Chicago International Airport (GYY) | Gary, Indiana (near Chicago), United States | |
| 9 | 47.89 miles (77.08 km) WNW | Chicago Rockford International Airport (RFD) | Rockford, Illinois, United States | |
| 10 | 50.32 miles (80.99 km) NNE | Kenosha Regional Airport (ENW) | Kenosha, Wisconsin, United States | |
| 11 | 60.44 miles (97.28 km) SW | Illinois Valley Regional Airport (VYS) | Peru, Illinois, United States | |
| 12 | 61.36 miles (98.76 km) SSE | Greater Kankakee Airport (IKK) | Kankakee, Illinois, United States | |
| 13 | 62.99 miles (101.37 km) NNE | John H. Batten Airport (RAC) | Racine, Wisconsin, United States | |
| 14 | 63.83 miles (102.73 km) NW | Southern Wisconsin Regional Airport (JVL) | Janesville, Wisconsin, United States | |
| 15 | 71.28 miles (114.72 km) ESE | Porter County Regional Airport (VPZ) | Valparaiso, Indiana, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,055.69 miles (17,792.37 km) WSW | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 11,032.32 miles (17,754.75 km) WSW | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 3 | 11,015.45 miles (17,727.60 km) WSW | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 4 | 11,007.65 miles (17,715.06 km) WSW | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 5 | 10,962.95 miles (17,643.11 km) WSW | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 6 | 10,953.42 miles (17,627.77 km) W | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 7 | 10,949.94 miles (17,622.17 km) WSW | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 8 | 10,939.68 miles (17,605.67 km) WSW | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 9 | 10,920.63 miles (17,575.01 km) WSW | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 10 | 10,916.35 miles (17,568.11 km) WSW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 11 | 10,865.76 miles (17,486.71 km) WSW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 12 | 10,834.29 miles (17,436.06 km) WSW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 13 | 10,823.41 miles (17,418.55 km) WSW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 14 | 10,814.14 miles (17,403.63 km) WSW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 15 | 10,775.27 miles (17,341.08 km) SW | Shark Bay Airport (MJK) | Monkey Mia, 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 | |