| Idanha-a-Nova to Cookeville (Tennessee) | 4,125.74 mi (6,639.74 km) |
| Idanha-a-Nova to Coolidge (Arizona) | 5,461.74 mi (8,789.82 km) |
| Idanha-a-Nova to Coon Rapids (Minnesota) | 4,181.53 mi (6,729.53 km) |
| Idanha-a-Nova to Cooper City (Florida) | 4,224.61 mi (6,798.85 km) |
| Idanha-a-Nova to Coos Bay (Oregon) | 5,471.17 mi (8,805.00 km) |
| Idanha-a-Nova to Copiague (New York) | 3,399.91 mi (5,471.63 km) |
| Idanha-a-Nova to Coppell (Texas) | 4,794.95 mi (7,716.73 km) |
| Idanha-a-Nova to Copperas Cove (Texas) | 4,912.90 mi (7,906.55 km) |
| Idanha-a-Nova to Coral Gables (Florida) | 4,236.80 mi (6,818.47 km) |
| Idanha-a-Nova to Coral Springs (Florida) | 4,214.76 mi (6,783.01 km) |
| Idanha-a-Nova to Coral Terrace (Florida) | 4,236.92 mi (6,818.66 km) |
| Idanha-a-Nova to Coralville (Iowa) | 4,222.43 mi (6,795.35 km) |
| Idanha-a-Nova to Coram (New York) | 3,375.73 mi (5,432.72 km) |
| Idanha-a-Nova to Corcoran (California) | 5,652.56 mi (9,096.92 km) |
| Idanha-a-Nova to Cordele (Georgia) | 4,186.01 mi (6,736.73 km) |
