| Idanha-a-Nova to Cicero (Illinois) | 4,043.74 mi (6,507.77 km) |
| Idanha-a-Nova to Cimarron Hills (Colorado) | 4,908.04 mi (7,898.73 km) |
| Idanha-a-Nova to Cincinnati (Ohio) | 3,978.49 mi (6,402.76 km) |
| Idanha-a-Nova to Cinco Ranch (Texas) | 4,864.30 mi (7,828.33 km) |
| Idanha-a-Nova to Circleville (Ohio) | 3,889.09 mi (6,258.88 km) |
| Idanha-a-Nova to Citrus (California) | 5,678.72 mi (9,139.02 km) |
| Idanha-a-Nova to Citrus Heights (California) | 5,593.67 mi (9,002.14 km) |
| Idanha-a-Nova to Citrus Park (Florida) | 4,266.33 mi (6,865.99 km) |
| Idanha-a-Nova to Claiborne (Louisiana) | 4,581.19 mi (7,372.71 km) |
| Idanha-a-Nova to Claremont (California) | 5,671.04 mi (9,126.66 km) |
| Idanha-a-Nova to Claremont (New Hampshire) | 3,282.98 mi (5,283.45 km) |
| Idanha-a-Nova to Claremore (Oklahoma) | 4,599.99 mi (7,402.98 km) |
| Idanha-a-Nova to Clarksburg (Maryland) | 3,627.88 mi (5,838.50 km) |
| Idanha-a-Nova to Clarksburg (West Virginia) | 3,773.98 mi (6,073.63 km) |
| Idanha-a-Nova to Clarksdale (Mississippi) | 4,440.18 mi (7,145.78 km) |
