| Castelo Branco to Cloverly (Maryland) | 3,608.03 mi (5,806.56 km) |
| Castelo Branco to Clovis (California) | 5,615.57 mi (9,037.38 km) |
| Castelo Branco to Clovis (New Mexico) | 5,015.18 mi (8,071.15 km) |
| Castelo Branco to Clute (Texas) | 4,864.68 mi (7,828.94 km) |
| Castelo Branco to Coachella (California) | 5,618.74 mi (9,042.48 km) |
| Castelo Branco to Coalinga (California) | 5,674.13 mi (9,131.64 km) |
| Castelo Branco to Coamo (Puerto Rico) | 3,787.21 mi (6,094.92 km) |
| Castelo Branco to Coatesville (Pennsylvania) | 3,525.98 mi (5,674.52 km) |
| Castelo Branco to Cockeysville (Maryland) | 3,579.37 mi (5,760.44 km) |
| Castelo Branco to Cocoa (Florida) | 4,150.45 mi (6,679.51 km) |
| Castelo Branco to Cocoa Beach (Florida) | 4,145.02 mi (6,670.77 km) |
| Castelo Branco to Coconut Creek (Florida) | 4,197.96 mi (6,755.97 km) |
| Castelo Branco to Coeur d'Alene (Idaho) | 5,000.35 mi (8,047.29 km) |
| Castelo Branco to Cohoes (New York) | 3,352.68 mi (5,395.62 km) |
| Castelo Branco to Cold Springs (Nevada) | 5,489.85 mi (8,835.07 km) |
