Nonstop flight route between Decatur, Illinois, United States and Mascot (near Sydney), Australia:
Departure Airport:

Arrival Airport:

Distance from DEC to SYD:
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- About this route
- DEC Airport Information
- SYD Airport Information
- Facts about DEC
- Facts about SYD
- Map of Nearest Airports to DEC
- List of Nearest Airports to DEC
- Map of Furthest Airports from DEC
- List of Furthest Airports from DEC
- Map of Nearest Airports to SYD
- List of Nearest Airports to SYD
- Map of Furthest Airports from SYD
- List of Furthest Airports from SYD
About this route:
A direct, nonstop flight between Decatur Airport (DEC), Decatur, Illinois, United States and Sydney (Kingsford Smith) Airport (SYD), Mascot (near Sydney), Australia would travel a Great Circle distance of 9,156 miles (or 14,735 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 Decatur Airport and Sydney (Kingsford Smith) 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 Decatur Airport and Sydney (Kingsford Smith) Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
IATA / ICAO Codes: | DEC / KDEC |
Airport Name: | Decatur Airport |
Location: | Decatur, Illinois, United States |
GPS Coordinates: | 39°50'3"N by 88°51'56"W |
Area Served: | Decatur, Illinois |
Operator/Owner: | Decatur Park District |
Airport Type: | Public |
Elevation: | 682 feet (208 meters) |
# of Runways: | 3 |
View all routes: | Routes from DEC |
More Information: | DEC Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | SYD / YSSY |
Airport Names: |
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Location: | Mascot (near Sydney), Australia |
GPS Coordinates: | 33°56'45"S by 151°10'37"E |
Area Served: | Sydney |
Operator/Owner: | Sydney Airport Corporation Limited |
Airport Type: | Public |
Elevation: | 21 feet (6 meters) |
# of Runways: | 3 |
View all routes: | Routes from SYD |
More Information: | SYD Maps & Info |
Facts about Decatur Airport (DEC):
- The furthest airport from Decatur Airport (DEC) is Margaret River Airport (MGV), which is located 11,056 miles (17,793 kilometers) away in Margaret River, Western Australia, Australia.
- Decatur Airport (DEC) has 3 runways.
- Decatur Airport covers 2,100 acres at an elevation of 682 feet.
- Because of Decatur Airport's relatively low elevation of 682 feet, planes can take off or land at Decatur 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 closest airport to Decatur Airport (DEC) is University of Illinois Willard Airport (CMI), which is located 34 miles (55 kilometers) ENE of DEC.
Facts about Sydney (Kingsford Smith) Airport (SYD):
- Terminal 3 is a domestic terminal, serving Qantas with QantasLink flights having moved their operations from Terminal 2 to Terminal 3 on 16 August 2013 Originally, it was home for Trans Australia Airlines.
- Because of Sydney (Kingsford Smith) Airport's relatively low elevation of 21 feet, planes can take off or land at Sydney (Kingsford Smith) 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 limitations of having only two runways that crossed each other had become apparent and governments grappled with Sydney's airport capacity for decades.
- Sydney (Kingsford Smith) Airport (SYD) has 3 runways.
- In 1933 the first gravel runways were built.
- In addition to being known as "Sydney (Kingsford Smith) Airport", another name for SYD is "Kingsford-Smith Airport".
- The closest airport to Sydney (Kingsford Smith) Airport (SYD) is Bankstown Airport (BWU), which is located only 11 miles (18 kilometers) W of SYD.
- Since the international terminal's original completion, it has undergone two large expansions.
- The trains that service the airport are regular suburban trains.
- In 1921 the federal government purchased 161 acres in Mascot for the purpose of creating a public airfield.
- The furthest airport from Sydney (Kingsford Smith) Airport (SYD) is Santa Maria Airport (SMA), which is nearly antipodal to Sydney (Kingsford Smith) Airport (meaning Sydney (Kingsford Smith) Airport is almost on the exact opposite side of the Earth from Santa Maria Airport), and is located 12,144 miles (19,543 kilometers) away in Santa Maria, Portugal.