Nonstop flight route between Cahokia, Illinois (near St. Louis), United States and Santa Ana, California, United States:
Departure Airport:

Arrival Airport:

Distance from CPS to SNA:
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- About this route
- CPS Airport Information
- SNA Airport Information
- Facts about CPS
- Facts about SNA
- 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 SNA
- List of Nearest Airports to SNA
- Map of Furthest Airports from SNA
- List of Furthest Airports from SNA
About this route:
A direct, nonstop flight between St. Louis Downtown Airport (CPS), Cahokia, Illinois (near St. Louis), United States and John Wayne Airport (SNA), Santa Ana, California, United States would travel a Great Circle distance of 1,577 miles (or 2,538 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 John Wayne Airport, 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: | SNA / KSNA |
Airport Name: | John Wayne Airport |
Location: | Santa Ana, California, United States |
GPS Coordinates: | 33°40'32"N by 117°52'5"W |
Area Served: | Orange County, California |
Operator/Owner: | Orange County |
Airport Type: | Public |
Elevation: | 56 feet (17 meters) |
# of Runways: | 2 |
View all routes: | Routes from SNA |
More Information: | SNA Maps & Info |
Facts about St. Louis Downtown Airport (CPS):
- The airport opened in 1929 as Curtiss-Steinberg Airport.
- Taken over by the United States Army Air Forces on 1 August 1939 as a basic pilot training airfield.
- 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.
- 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.
- 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.
- St. Louis Downtown Airport (CPS) has 3 runways.
Facts about John Wayne Airport (SNA):
- John Wayne Airport (SNA) has 2 runways.
- During the 1950s, the only airline flights were Bonanza's few flights between Los Angeles and Phoenix, via San Diego.
- A statue of the airport's namesake welcomes passengers in the arrivals area on the lower level.
- The furthest airport from John Wayne Airport (SNA) is Pierrefonds Airport (ZSE), which is located 11,490 miles (18,491 kilometers) away in Saint-Pierre, Réunion.
- The closest airport to John Wayne Airport (SNA) is MCAS El Toro (NZJ), which is located only 8 miles (13 kilometers) E of SNA.
- Because of John Wayne Airport's relatively low elevation of 56 feet, planes can take off or land at John Wayne 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 National Plan of Integrated Airport Systems for 2011–2015 categorized it as a primary commercial service airport since it has over 10,000 passenger boardings per year.Federal Aviation Administration records say the airport had 4,247,802 enplanements in calendar year 2011, a decrease from 4,278,623 in 2010.
- Terminals A and B were built in 1990 to replace the former Eddie Martin Terminal which was closed upon the new terminals' opening.