| Castelo Branco to Cookeville (Tennessee) | 4,115.56 mi (6,623.36 km) |
| Castelo Branco to Coolidge (Arizona) | 5,453.88 mi (8,777.17 km) |
| Castelo Branco to Coon Rapids (Minnesota) | 4,174.17 mi (6,717.68 km) |
| Castelo Branco to Cooper City (Florida) | 4,212.05 mi (6,778.65 km) |
| Castelo Branco to Coos Bay (Oregon) | 5,467.02 mi (8,798.32 km) |
| Castelo Branco to Copiague (New York) | 3,389.72 mi (5,455.22 km) |
| Castelo Branco to Coppell (Texas) | 4,785.33 mi (7,701.24 km) |
| Castelo Branco to Copperas Cove (Texas) | 4,903.04 mi (7,890.68 km) |
| Castelo Branco to Coral Gables (Florida) | 4,224.19 mi (6,798.17 km) |
| Castelo Branco to Coral Springs (Florida) | 4,202.24 mi (6,762.85 km) |
| Castelo Branco to Coral Terrace (Florida) | 4,224.32 mi (6,798.38 km) |
| Castelo Branco to Coralville (Iowa) | 4,214.08 mi (6,781.90 km) |
| Castelo Branco to Coram (New York) | 3,365.56 mi (5,416.35 km) |
| Castelo Branco to Corcoran (California) | 5,646.39 mi (9,086.99 km) |
| Castelo Branco to Cordele (Georgia) | 4,174.82 mi (6,718.72 km) |
