| Portimao to Castle Rock (Colorado) | 4,948.86 mi (7,964.41 km) |
| Portimao to Castro Valley (California) | 5,752.03 mi (9,256.99 km) |
| Portimao to Catalina Foothills (Arizona) | 5,507.64 mi (8,863.69 km) |
| Portimao to Cataño (Puerto Rico) | 3,690.16 mi (5,938.74 km) |
| Portimao to Cathedral City (California) | 5,692.89 mi (9,161.83 km) |
| Portimao to Catonsville (Maryland) | 3,614.87 mi (5,817.57 km) |
| Portimao to Cave Spring (Virginia) | 3,831.98 mi (6,166.98 km) |
| Portimao to Cayce (South Carolina) | 3,979.25 mi (6,403.99 km) |
| Portimao to Cayey (Puerto Rico) | 3,703.38 mi (5,960.02 km) |
| Portimao to Cedar City (Utah) | 5,378.89 mi (8,656.49 km) |
| Portimao to Cedar Falls (Iowa) | 4,280.06 mi (6,888.10 km) |
| Portimao to Cedar Hill (Texas) | 4,829.83 mi (7,772.85 km) |
| Portimao to Cedar Lake (Indiana) | 4,080.46 mi (6,566.87 km) |
| Portimao to Cedar Mill (Oregon) | 5,415.58 mi (8,715.53 km) |
| Portimao to Cedar Park (Texas) | 4,949.28 mi (7,965.10 km) |
