Nonstop flight route between Alton, Illinois, United States and Palo Alto, California, United States:
Departure Airport:
(38°53'25"N by 90°2'45"W)
Arrival Airport:
(37°27'39"N by 122°6'53"W)
Distance from ALN to PAO:
1,735.68 miles (2,793.30 km)
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- About this route
- ALN Airport Information
- PAO Airport Information
- Facts about ALN
- Facts about PAO
- Map of Nearest Airports to ALN
- List of Nearest Airports to ALN
- Map of Furthest Airports from ALN
- List of Furthest Airports from ALN
- Map of Nearest Airports to PAO
- List of Nearest Airports to PAO
- Map of Furthest Airports from PAO
- List of Furthest Airports from PAO
About this route:
A direct, nonstop flight between St. Louis Regional Airport (ALN), Alton, Illinois, United States and Palo Alto Airport of Santa Clara County (PAO), Palo Alto, California, United States would travel a Great Circle distance of 1,736 miles (or 2,793 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 St. Louis Regional Airport and Palo Alto Airport of Santa Clara County, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | ALN / KALN |
| Airport Name: | St. Louis Regional Airport |
| Location: | Alton, Illinois, United States |
| GPS Coordinates: | 38°53'25"N by 90°2'45"W |
| Area Served: | Alton, Illinois |
| Operator/Owner: | St. Louis Regional |
| Airport Type: | Public |
| Elevation: | 544 feet (166 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from ALN |
| More Information: | ALN Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | PAO / KPAO |
| Airport Name: | Palo Alto Airport of Santa Clara County |
| Location: | Palo Alto, California, United States |
| GPS Coordinates: | 37°27'39"N by 122°6'53"W |
| Operator/Owner: | County of Santa Clara |
| Airport Type: | Public |
| Elevation: | 4 feet (1 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from PAO |
| More Information: | PAO Maps & Info |
Facts about St. Louis Regional Airport (ALN):
- The furthest airport from St. Louis Regional Airport (ALN) is Margaret River Airport (MGV), which is located 11,002 miles (17,706 kilometers) away in Margaret River, Western Australia, Australia.
- Civic Memorial Airport opened in 1946 and received its current name in 1984.
- St. Louis Regional Airport (ALN) has 2 runways.
- The closest airport to St. Louis Regional Airport (ALN) is Lambert–St. Louis International Airport (STL), which is located only 20 miles (32 kilometers) WSW of ALN.
- Because of St. Louis Regional Airport's relatively low elevation of 544 feet, planes can take off or land at St. Louis Regional 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.
Facts about Palo Alto Airport of Santa Clara County (PAO):
- The airport was transferred to the United States Navy as King City NAAS in April 1945, and returned to civil control in December 1945.
- The closest airport to Palo Alto Airport of Santa Clara County (PAO) is Moffett Federal Airfield (NUQ), which is located only 5 miles (8 kilometers) SE of PAO.
- The VOR approach is almost impossible to get from Air Traffic Control if the aircraft is GPS-equipped, because of the conflict with airline traffic in San Jose International Airport.
- The furthest airport from Palo Alto Airport of Santa Clara County (PAO) is Tôlanaro Airport (FTU), which is located 11,365 miles (18,289 kilometers) away in Tôlanaro, Madagascar.
- Comparison of the aerial photographs indicate that no development had begun in the vicinity prior to 1956 other than the Palo Alto Airport and the Regional Water Quality Control Board Plant.
- Palo Alto Airport of Santa Clara County (PAO) currently has only 1 runway.
- Because of Palo Alto Airport of Santa Clara County's relatively low elevation of 4 feet, planes can take off or land at Palo Alto Airport of Santa Clara County 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.
- Palo Alto Airport of Santa Clara County covers 102 acres and has one asphalt paved runway measuring 2,443 × 70 ft.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 19.64 miles (31.61 km) WSW | Lambert–St. Louis International Airport (STL) | St. Louis, Missouri, United States |     |
| 2 | 22.85 miles (36.78 km) SSW | St. Louis Downtown Airport (CPS) | Cahokia, Illinois (near St. Louis), United States | |
| 3 | 26.41 miles (42.50 km) SSE | MidAmerica St. Louis Airport (BLV) | Belleville, Illinois, United States | |
| 4 | 36.08 miles (58.06 km) E | Greenville Airport (GRE) | Greenville, Illinois, United States | |
| 5 | 36.24 miles (58.32 km) WSW | Spirit of St. Louis Airport (SUS) | Chesterfield, Missouri, United States | |
| 6 | 60.74 miles (97.76 km) ESE | Salem–Leckrone Airport (SLO) | Salem, Illinois, United States | |
| 7 | 68.78 miles (110.69 km) NNE | Abraham Lincoln Capital Airport (SPI) | Springfield, Illinois, United States | |
| 8 | 75.13 miles (120.92 km) ESE | Mt. Vernon Airport (MVN) | Mount Vernon, Illinois, United States | |
| 9 | 88.08 miles (141.75 km) SSE | Southern Illinois Airport (MDH) | Carbondale/Murphysboro, Illinois, United States | |
| 10 | 90.73 miles (146.02 km) NE | Decatur Airport (DEC) | Decatur, Illinois, United States | |
| 11 | 95.12 miles (153.07 km) NW | Quincy Regional Airport (UIN) | Quincy, Illinois, United States | |
| 12 | 96.44 miles (155.20 km) SE | Williamson County Regional Airport (MWA) | Marion, Illinois, United States | |
| 13 | 102.97 miles (165.72 km) ENE | Coles County Memorial Airport (MTO) | Mattoon/Charleston, Illinois, United States | |
| 14 | 107.04 miles (172.27 km) WSW | Rolla National Airport (VIH) | Rolla, Missouri, United States | |
| 15 | 115.57 miles (186.00 km) W | Jefferson City Memorial Airport (JEF) | Jefferson City, Missouri, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,002.15 miles (17,706.21 km) W | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 10,979.99 miles (17,670.53 km) W | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 3 | 10,957.22 miles (17,633.90 km) W | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 4 | 10,954.58 miles (17,629.65 km) W | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 5 | 10,926.12 miles (17,583.85 km) W | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 6 | 10,910.74 miles (17,559.09 km) W | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 7 | 10,901.55 miles (17,544.30 km) W | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 8 | 10,897.24 miles (17,537.37 km) WSW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 9 | 10,880.36 miles (17,510.20 km) W | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 10 | 10,861.31 miles (17,479.54 km) WSW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 11 | 10,859.59 miles (17,476.77 km) W | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 12 | 10,841.22 miles (17,447.21 km) WSW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 13 | 10,808.74 miles (17,394.93 km) WSW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 14 | 10,807.95 miles (17,393.67 km) WSW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 15 | 10,799.72 miles (17,380.43 km) WSW | Shark Bay Airport (MJK) | Monkey Mia, Western Australia, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 4.85 miles (7.81 km) SE | Moffett Federal Airfield (NUQ) | Mountain View, California, United States | |
| 2 | 12.25 miles (19.72 km) ESE | Norman Y. Mineta San Jose International Airport (SJC) | San Jose, California, United States | |
| 3 | 13.67 miles (22.00 km) N | Hayward Executive Airport (HWD) | Hayward, California, United States | |
| 4 | 17.94 miles (28.87 km) NW | San Francisco International Airport (SFO) | San Francisco, California, United States | |
| 5 | 18.47 miles (29.73 km) ESE | Reid-Hillview Airport of Santa Clara County (RHV) | San Jose, California, United States | |
| 6 | 18.89 miles (30.41 km) NNW | Oakland International Airport (OAK) | Oakland (near San Francisco), California, United States | |
| 7 | 21.47 miles (34.56 km) W | Half Moon Bay AirportHalf Moon Bay Flight Strip (HAF) | Half Moon Bay, California, United States | |
| 8 | 22.76 miles (36.62 km) NE | Livermore Municipal Airport (LVK) | Livermore, California, United States | |
| 9 | 36.66 miles (59.00 km) N | Buchanan FieldConcord Army Air Base (CCR) | Concord, California, United States | |
| 10 | 40.47 miles (65.13 km) SSE | Watsonville Municipal Airport (WVI) | Watsonville, California, United States | |
| 11 | 52.74 miles (84.88 km) N | Napa County Airport (APC) | Napa, California, United States | |
| 12 | 52.95 miles (85.21 km) NNW | Marin County Airport (NOT) | Novato, California, United States | |
| 13 | 55.17 miles (88.79 km) SE | Hollister Municipal Airport (HLI) | Hollister, California, United States | |
| 14 | 55.29 miles (88.98 km) E | NASA Crows Landing Airport (NRC) | Crows Landing, California, United States | |
| 15 | 56.33 miles (90.65 km) N | Travis Air Force Base Fairfield-Suisun Army Airfield (SUU) | Fairfield, California, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,364.54 miles (18,289.40 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 2 | 11,312.01 miles (18,204.87 km) S | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 3 | 11,283.08 miles (18,158.32 km) S | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 4 | 11,263.27 miles (18,126.43 km) SE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 5 | 11,260.00 miles (18,121.17 km) S | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 6 | 11,177.10 miles (17,987.75 km) SSE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 7 | 11,169.97 miles (17,976.28 km) SSW | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 8 | 11,156.35 miles (17,954.37 km) SSE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 9 | 11,064.70 miles (17,806.86 km) SE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 10 | 11,063.42 miles (17,804.81 km) SE | Manja Airport (MJA) | Manja, Menabe, Madagascar | |
| 11 | 11,048.60 miles (17,780.95 km) SE | Morombe Airport (MXM) | Morombe, Madagascar | |
| 12 | 11,004.18 miles (17,709.47 km) SSE | Toamasino Airport (TMM) | Toamasina, Madagascar | |
| 13 | 11,002.17 miles (17,706.24 km) SSE | Ivato International Airport (TNR) | Antananarivo, Madagascar | |
| 14 | 10,991.14 miles (17,688.48 km) SE | Miandrivazo Airport (ZVA) | Miandrivazo, Madagascar | |
| 15 | 10,969.47 miles (17,653.61 km) SE | Belo sur Tsiribihina Airport (BMD) | Belo sur Tsiribihina, Madagascar | |