| Castelo Branco to Caño Martin Peña (Puerto Rico) | 3,756.15 mi (6,044.94 km) |
| Castelo Branco to Cañon City (Colorado) | 4,940.18 mi (7,950.46 km) |
| Castelo Branco to Canóvanas (Puerto Rico) | 3,750.75 mi (6,036.25 km) |
| Castelo Branco to Canton (Georgia) | 4,130.54 mi (6,647.46 km) |
| Castelo Branco to Canton (Illinois) | 4,181.38 mi (6,729.29 km) |
| Castelo Branco to Canton (Mississippi) | 4,462.80 mi (7,182.18 km) |
| Castelo Branco to Canton (Ohio) | 3,768.94 mi (6,065.52 km) |
| Castelo Branco to Canyon (Texas) | 4,934.28 mi (7,940.96 km) |
| Castelo Branco to Canyon Lake (California) | 5,666.00 mi (9,118.54 km) |
| Castelo Branco to Canyon Lake (Texas) | 4,970.13 mi (7,998.65 km) |
| Castelo Branco to Cape Coral (Florida) | 4,278.39 mi (6,885.40 km) |
| Castelo Branco to Cape Girardeau (Missouri) | 4,270.09 mi (6,872.04 km) |
| Castelo Branco to Carbondale (Illinois) | 4,239.89 mi (6,823.45 km) |
| Castelo Branco to Carlisle (Pennsylvania) | 3,587.07 mi (5,772.83 km) |
| Castelo Branco to Carlsbad (California) | 5,693.54 mi (9,162.87 km) |
