Nonstop flight route between Cahokia, Illinois (near St. Louis), United States and Frying Pan Island (near Parry Sound), Ontario, Canada:
Departure Airport:

Arrival Airport:

Distance from CPS to YSI:
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- About this route
- CPS Airport Information
- YSI Airport Information
- Facts about CPS
- Facts about YSI
- 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 YSI
- List of Nearest Airports to YSI
- Map of Furthest Airports from YSI
- List of Furthest Airports from YSI
About this route:
A direct, nonstop flight between St. Louis Downtown Airport (CPS), Cahokia, Illinois (near St. Louis), United States and Parry Sound/Frying Pan Island-Sans Souci Water Aerodrome (YSI), Frying Pan Island (near Parry Sound), Ontario, Canada would travel a Great Circle distance of 687 miles (or 1,106 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 Parry Sound/Frying Pan Island-Sans Souci Water Aerodrome, 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: | YSI / |
Airport Names: |
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Location: | Frying Pan Island (near Parry Sound), Ontario, Canada |
GPS Coordinates: | 45°10'23"N by 80°8'15"W |
Operator/Owner: | Henry's Fish Restaurant |
Airport Type: | Public |
Elevation: | 580 feet (177 meters) |
View all routes: | Routes from YSI |
More Information: | YSI Maps & Info |
Facts about St. Louis Downtown Airport (CPS):
- 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.
- The airport opened in 1929 as Curtiss-Steinberg Airport.
- 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.
- St. Louis Downtown Airport (CPS) has 3 runways.
Facts about Parry Sound/Frying Pan Island-Sans Souci Water Aerodrome (YSI):
- The closest airport to Parry Sound/Frying Pan Island-Sans Souci Water Aerodrome (YSI) is Parry Sound Area Municipal Airport (YPD), which is located only 16 miles (26 kilometers) ENE of YSI.
- Because of Parry Sound/Frying Pan Island-Sans Souci Water Aerodrome's relatively low elevation of 580 feet, planes can take off or land at Parry Sound/Frying Pan Island-Sans Souci Water Aerodrome 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 Parry Sound/Frying Pan Island-Sans Souci Water Aerodrome (YSI) is Margaret River Airport (MGV), which is located 11,317 miles (18,213 kilometers) away in Margaret River, Western Australia, Australia.
- In addition to being known as "Parry Sound/Frying Pan Island-Sans Souci Water Aerodrome", another name for YSI is "CPS9".