| Portimao to Caguas (Puerto Rico) | 3,692.14 mi (5,941.92 km) |
| Portimao to Cahokia (Illinois) | 4,294.96 mi (6,912.07 km) |
| Portimao to Calabasas (California) | 5,775.25 mi (9,294.36 km) |
| Portimao to Caldwell (Idaho) | 5,270.09 mi (8,481.40 km) |
| Portimao to Caledonia (Wisconsin) | 4,060.93 mi (6,535.44 km) |
| Portimao to Calera (Alabama) | 4,297.68 mi (6,916.44 km) |
| Portimao to Calexico (California) | 5,700.93 mi (9,174.76 km) |
| Portimao to Calhoun (Georgia) | 4,162.16 mi (6,698.35 km) |
| Portimao to California (Maryland) | 3,626.41 mi (5,836.15 km) |
| Portimao to California City (California) | 5,694.87 mi (9,165.00 km) |
| Portimao to Callaway (Florida) | 4,335.19 mi (6,976.82 km) |
| Portimao to Calumet City (Illinois) | 4,078.84 mi (6,564.25 km) |
| Portimao to Calverton (Maryland) | 3,630.29 mi (5,842.38 km) |
| Portimao to Camano (Washington) | 5,281.92 mi (8,500.43 km) |
| Portimao to Camarillo (California) | 5,786.97 mi (9,313.23 km) |
