Nonstop flight route between Cahokia, Illinois (near St. Louis), United States and San Juan Island, Washington, United States:
Departure Airport:
(38°34'14"N by 90°9'21"W)
Arrival Airport:
(48°36'29"N by 123°9'34"W)
Distance from CPS to RCE:
1,773.87 miles (2,854.77 km)
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- About this route
- CPS Airport Information
- RCE Airport Information
- Facts about CPS
- Facts about RCE
- Map of Nearest Airports to CPS
- List of Nearest Airports to CPS
- Map of Furthest Airports from CPS
- List of Furthest Airports from CPS
- Map of Nearest Airports to RCE
- List of Nearest Airports to RCE
- Map of Furthest Airports from RCE
- List of Furthest Airports from RCE
About this route:
A direct, nonstop flight between St. Louis Downtown Airport (CPS), Cahokia, Illinois (near St. Louis), United States and Roche Harbor Seaplane Base (RCE), San Juan Island, Washington, United States would travel a Great Circle distance of 1,774 miles (or 2,855 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 Downtown Airport and Roche Harbor Seaplane Base, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | CPS / KCPS |
| Airport Name: | St. Louis Downtown Airport |
| Location: | Cahokia, Illinois (near St. Louis), United States |
| GPS Coordinates: | 38°34'14"N by 90°9'21"W |
| Area Served: | Greater St. Louis |
| Operator/Owner: | Bi-State Development Agency |
| Airport Type: | Public |
| Elevation: | 413 feet (126 meters) |
| # of Runways: | 3 |
| View all routes: | Routes from CPS |
| More Information: | CPS Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | RCE / |
| Airport Names: |
|
| Location: | San Juan Island, Washington, United States |
| GPS Coordinates: | 48°36'29"N by 123°9'34"W |
| Area Served: | Roche Harbor, Washington |
| Operator/Owner: | Roche Harbor Resort |
| Airport Type: | Public |
| Elevation: | 0 feet (0 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from RCE |
| More Information: | RCE Maps & Info |
Facts about St. Louis Downtown Airport (CPS):
- The two survivors out of the airport's original four hangars, Hangar 1 and Hangar 2, are listed on the National Register of Historic Places.
- The closest airport to St. Louis Downtown Airport (CPS) is Lambert–St. Louis International Airport (STL), which is located only 16 miles (27 kilometers) NW of CPS.
- Because of St. Louis Downtown Airport's relatively low elevation of 413 feet, planes can take off or land at St. Louis Downtown 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.
- St. Louis Downtown Airport (CPS) has 3 runways.
- The furthest airport from St. Louis Downtown Airport (CPS) is Margaret River Airport (MGV), which is located 10,998 miles (17,700 kilometers) away in Margaret River, Western Australia, Australia.
Facts about Roche Harbor Seaplane Base (RCE):
- In addition to being known as "Roche Harbor Seaplane Base", another name for RCE is "W39".
- Because of Roche Harbor Seaplane Base's relatively low elevation of 0 feet, planes can take off or land at Roche Harbor Seaplane Base 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.
- Roche Harbor Seaplane Base (RCE) has 2 runways.
- The closest airport to Roche Harbor Seaplane Base (RCE) is Friday Harbor Seaplane Base (FBS), which is located only 8 miles (14 kilometers) SE of RCE.
- The furthest airport from Roche Harbor Seaplane Base (RCE) is Tôlanaro Airport (FTU), which is located 10,722 miles (17,256 kilometers) away in Tôlanaro, Madagascar.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 16.47 miles (26.50 km) NW | Lambert–St. Louis International Airport (STL) | St. Louis, Missouri, United States |     |
| 2 | 17.42 miles (28.04 km) E | MidAmerica St. Louis Airport (BLV) | Belleville, Illinois, United States | |
| 3 | 22.85 miles (36.78 km) NNE | St. Louis Regional Airport (ALN) | Alton, Illinois, United States | |
| 4 | 27.50 miles (44.26 km) WNW | Spirit of St. Louis Airport (SUS) | Chesterfield, Missouri, United States | |
| 5 | 45.73 miles (73.59 km) ENE | Greenville Airport (GRE) | Greenville, Illinois, United States | |
| 6 | 64.55 miles (103.88 km) E | Salem–Leckrone Airport (SLO) | Salem, Illinois, United States | |
| 7 | 72.26 miles (116.30 km) ESE | Mt. Vernon Airport (MVN) | Mount Vernon, Illinois, United States | |
| 8 | 73.57 miles (118.39 km) SE | Southern Illinois Airport (MDH) | Carbondale/Murphysboro, Illinois, United States | |
| 9 | 83.94 miles (135.09 km) SE | Williamson County Regional Airport (MWA) | Marion, Illinois, United States | |
| 10 | 91.63 miles (147.46 km) NNE | Abraham Lincoln Capital Airport (SPI) | Springfield, Illinois, United States | |
| 11 | 92.63 miles (149.07 km) WSW | Rolla National Airport (VIH) | Rolla, Missouri, United States | |
| 12 | 98.29 miles (158.19 km) SSE | Cape Girardeau Regional Airport (CGI) | Cape Girardeau, Missouri, United States | |
| 13 | 108.03 miles (173.86 km) W | Jefferson City Memorial Airport (JEF) | Jefferson City, Missouri, United States | |
| 14 | 109.88 miles (176.83 km) NNW | Quincy Regional Airport (UIN) | Quincy, Illinois, United States | |
| 15 | 111.34 miles (179.18 km) NE | Decatur Airport (DEC) | Decatur, Illinois, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,998.38 miles (17,700.14 km) W | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 10,976.37 miles (17,664.71 km) W | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 3 | 10,953.82 miles (17,628.43 km) W | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 4 | 10,950.15 miles (17,622.51 km) W | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 5 | 10,924.13 miles (17,580.63 km) W | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 6 | 10,908.52 miles (17,555.52 km) W | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 7 | 10,899.45 miles (17,540.92 km) W | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 8 | 10,897.05 miles (17,537.06 km) WSW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 9 | 10,874.80 miles (17,501.25 km) W | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 10 | 10,862.63 miles (17,481.67 km) WSW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 11 | 10,855.26 miles (17,469.80 km) W | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 12 | 10,843.70 miles (17,451.20 km) WSW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 13 | 10,809.16 miles (17,395.61 km) WSW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 14 | 10,809.10 miles (17,395.51 km) WSW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 15 | 10,804.00 miles (17,387.31 km) WSW | Shark Bay Airport (MJK) | Monkey Mia, Western Australia, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 8.43 miles (13.56 km) SE | Friday Harbor Seaplane Base (FBS) | Friday Harbor, Washington, United States | |
| 2 | 8.58 miles (13.81 km) SE | Friday Harbor Airport (FRD) | Friday Harbor, Washington, United States | |
| 3 | 9.30 miles (14.97 km) E | Westsound Seaplane Base (WSX) | Westsound, Orcas Island, Washington, United States | |
| 4 | 10.06 miles (16.20 km) NNW | Bedwell Harbour Water Aerodrome (YBW) | Bedwell Harbour, British Columbia, Canada | |
| 5 | 12.45 miles (20.04 km) WNW | Victoria International Airport (YYJ) | Victoria, British Columbia, Canada | |
| 6 | 12.74 miles (20.50 km) ESE | Fishermans Bay/LPS Seaplane Base (LPS) | Lopez Island, Washington, United States | |
| 7 | 13.31 miles (21.41 km) ENE | Orcas Island Airport (ESD) | Eastsound, Washington, United States | |
| 8 | 13.57 miles (21.84 km) E | Rosario Seaplane Base (RSJ) | Orcas Island, Washington, United States | |
| 9 | 16.35 miles (26.31 km) SW | Esquimalt Airport (YPF) | Esquimalt, British Columbia, Canada | |
| 10 | 16.51 miles (26.57 km) SW | Victoria Inner Harbour Airport (YWH) | Victoria, British Columbia, Canada | |
| 11 | 17.08 miles (27.48 km) ESE | Center Island Airport (CWS) | Center Island, Washington, United States | |
| 12 | 19.00 miles (30.58 km) NNW | Mayne Island Water Aerodrome (YAV) | Miner's Bay, British Columbia, Canada | |
| 13 | 22.80 miles (36.70 km) NW | Ganges Water Aerodrome (YGG) | Ganges, British Columbia, Canada | |
| 14 | 23.96 miles (38.56 km) ESE | Anacortes Airport (OTS) | Anacortes, Washington, United States | |
| 15 | 27.45 miles (44.17 km) WNW | Duncan Airport (DUQ) | Duncan, British Columbia, Canada | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,722.36 miles (17,255.92 km) SSE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 2 | 10,658.87 miles (17,153.74 km) SSE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 3 | 10,594.91 miles (17,050.81 km) ESE | East London Airport (ELS) | East London, South Africa | |
| 4 | 10,586.81 miles (17,037.77 km) ESE | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 5 | 10,580.38 miles (17,027.43 km) ESE | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 6 | 10,556.17 miles (16,988.47 km) ESE | Mthatha Airport (UTT) | Mthatha, South Africa | |
| 7 | 10,550.10 miles (16,978.70 km) SE | King Shaka International (DUR) | Durban, KwaZulu-Natal, South Africa | |
| 8 | 10,549.87 miles (16,978.33 km) S | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 9 | 10,546.60 miles (16,973.07 km) ESE | Port Elizabeth International Airport (PLZ) | Port Elizabeth, South Africa | |
| 10 | 10,538.66 miles (16,960.29 km) SE | Richards Bay Airport (RCB) | Richards Bay, KwaZulu-Natal, South Africa | |
| 11 | 10,524.85 miles (16,938.07 km) ESE | Pietermaritzburg Airport (PZB) | Pietermaritzburg, South Africa | |
| 12 | 10,520.26 miles (16,930.68 km) S | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 13 | 10,504.51 miles (16,905.33 km) SE | Hluhluwe Airport (HLW) | Hluhluwe, South Africa | |
| 14 | 10,489.32 miles (16,880.89 km) S | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 15 | 10,486.01 miles (16,875.56 km) SSE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |