| Idanha-a-Nova to Castle Rock (Colorado) | 4,893.48 mi (7,875.30 km) |
| Idanha-a-Nova to Castro Valley (California) | 5,671.61 mi (9,127.58 km) |
| Idanha-a-Nova to Catalina Foothills (Arizona) | 5,461.90 mi (8,790.08 km) |
| Idanha-a-Nova to Cataño (Puerto Rico) | 3,775.51 mi (6,076.10 km) |
| Idanha-a-Nova to Cathedral City (California) | 5,632.51 mi (9,064.64 km) |
| Idanha-a-Nova to Catonsville (Maryland) | 3,601.25 mi (5,795.66 km) |
| Idanha-a-Nova to Cave Spring (Virginia) | 3,822.01 mi (6,150.93 km) |
| Idanha-a-Nova to Cayce (South Carolina) | 3,980.25 mi (6,405.60 km) |
| Idanha-a-Nova to Cayey (Puerto Rico) | 3,789.75 mi (6,099.02 km) |
| Idanha-a-Nova to Cedar City (Utah) | 5,314.51 mi (8,552.87 km) |
| Idanha-a-Nova to Cedar Falls (Iowa) | 4,232.94 mi (6,812.26 km) |
| Idanha-a-Nova to Cedar Hill (Texas) | 4,808.66 mi (7,738.78 km) |
| Idanha-a-Nova to Cedar Lake (Indiana) | 4,044.25 mi (6,508.58 km) |
| Idanha-a-Nova to Cedar Mill (Oregon) | 5,315.54 mi (8,554.54 km) |
| Idanha-a-Nova to Cedar Park (Texas) | 4,933.04 mi (7,938.96 km) |
