Nonstop flight route between Rockford, Illinois, United States and Atwater, California, United States:
Departure Airport:

Arrival Airport:

Distance from RFD to MER:
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- About this route
- RFD Airport Information
- MER Airport Information
- Facts about RFD
- Facts about MER
- Map of Nearest Airports to RFD
- List of Nearest Airports to RFD
- Map of Furthest Airports from RFD
- List of Furthest Airports from RFD
- Map of Nearest Airports to MER
- List of Nearest Airports to MER
- Map of Furthest Airports from MER
- List of Furthest Airports from MER
About this route:
A direct, nonstop flight between Chicago Rockford International Airport (RFD), Rockford, Illinois, United States and Castle Airport (MER), Atwater, California, United States would travel a Great Circle distance of 1,694 miles (or 2,726 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 Chicago Rockford International Airport and Castle Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
IATA / ICAO Codes: | RFD / KRFD |
Airport Name: | Chicago Rockford International Airport |
Location: | Rockford, Illinois, United States |
GPS Coordinates: | 42°11'43"N by 89°5'49"W |
Area Served: | Rockford, Illinois |
Operator/Owner: | Greater Rockford Airport Authority |
Airport Type: | Public |
Elevation: | 742 feet (226 meters) |
# of Runways: | 2 |
View all routes: | Routes from RFD |
More Information: | RFD Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | MER / KMER |
Airport Name: | Castle Airport |
Location: | Atwater, California, United States |
GPS Coordinates: | 37°22'50"N by 120°34'5"W |
Operator/Owner: | Merced County Department of Commerce, Aviation, and Economic Development |
Airport Type: | Public |
Elevation: | 191 feet (58 meters) |
# of Runways: | 1 |
View all routes: | Routes from MER |
More Information: | MER Maps & Info |
Facts about Chicago Rockford International Airport (RFD):
- RFD traces its history back to 1917, when Camp Grant was established during World War I as an U.S.
- The furthest airport from Chicago Rockford International Airport (RFD) is Margaret River Airport (MGV), which is located 11,008 miles (17,716 kilometers) away in Margaret River, Western Australia, Australia.
- In an effort to capitalize on the airport's location from downtown Chicago and about 30 miles from the outermost Chicago suburbs), its name was changed to the Northwest Chicagoland Regional Airport at Rockford in the early 2000s.
- Several airlines have previously served the airport including United Express, Hooters Air, Frontier, Midwest Connect, Midway Connection, Trans Meridian, American Eagle, TWA, Ozark, McClain, Direct Air, Northwest Airlink, etc.
- Following the war, the state of Illinois adopted the Airport Authority Act.
- The closest airport to Chicago Rockford International Airport (RFD) is Southern Wisconsin Regional Airport (JVL), which is located 30 miles (47 kilometers) N of RFD.
- Because of Chicago Rockford International Airport's relatively low elevation of 742 feet, planes can take off or land at Chicago Rockford International 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.
- Air shows have played an integral role in the history of the Rockford Airport.
- The current terminal was built in 1987 in an effort to expand airline service in Rockford, but the common use of bus service to O'Hare International Airport kept most airlines away from Rockford.
- Chicago Rockford International Airport (RFD) has 2 runways.
Facts about Castle Airport (MER):
- EPA investigations have been completed at multiple areas of contamination including landfills, discharge areas, chemical disposal areas, fire training areas, fuel spill areas, and polychlorinated biphenyl spill areas.
- Castle Airport covers an area of 1,360 acres which contains one runway with an 11,802 x 150 ft asphalt and concrete pavement.
- Castle Air Museum is 500 yards away, displaying over 50 restored World War II, Korean War, and Cold War era aircraft.
- The closest airport to Castle Airport (MER) is Merced Regional Airport (MCE), which is located only 7 miles (12 kilometers) SSE of MER.
- The furthest airport from Castle Airport (MER) is Tôlanaro Airport (FTU), which is located 11,312 miles (18,204 kilometers) away in Tôlanaro, Madagascar.
- Castle Airport (MER) currently has only 1 runway.
- Because of Castle Airport's relatively low elevation of 191 feet, planes can take off or land at Castle 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.
- Since the mid-1940s, aircraft maintenance, fuel management, and fire training activities on the base have generated wastes that consist primarily of waste fuels, oils, solvents, and cleaners.