| Portimao to Cloverly (Maryland) | 3,631.63 mi (5,844.54 km) |
| Portimao to Clovis (California) | 5,695.52 mi (9,166.06 km) |
| Portimao to Clovis (New Mexico) | 5,061.64 mi (8,145.92 km) |
| Portimao to Clute (Texas) | 4,882.36 mi (7,857.40 km) |
| Portimao to Coachella (California) | 5,685.23 mi (9,149.50 km) |
| Portimao to Coalinga (California) | 5,753.62 mi (9,259.56 km) |
| Portimao to Coamo (Puerto Rico) | 3,715.87 mi (5,980.12 km) |
| Portimao to Coatesville (Pennsylvania) | 3,551.58 mi (5,715.72 km) |
| Portimao to Cockeysville (Maryland) | 3,603.97 mi (5,800.03 km) |
| Portimao to Cocoa (Florida) | 4,140.83 mi (6,664.02 km) |
| Portimao to Cocoa Beach (Florida) | 4,134.99 mi (6,654.62 km) |
| Portimao to Coconut Creek (Florida) | 4,180.31 mi (6,727.56 km) |
| Portimao to Coeur d'Alene (Idaho) | 5,101.09 mi (8,209.40 km) |
| Portimao to Cohoes (New York) | 3,387.33 mi (5,451.38 km) |
| Portimao to Cold Springs (Nevada) | 5,576.80 mi (8,974.99 km) |
