| Portimao to Cortona | 1,159.44 mi (1,865.94 km) |
| Portimao to Cosenza | 1,349.61 mi (2,171.99 km) |
| Portimao to Cossato | 1,040.72 mi (1,674.87 km) |
| Portimao to Costa Volpino | 1,132.19 mi (1,822.08 km) |
| Portimao to Creazzo | 1,185.01 mi (1,907.08 km) |
| Portimao to Crema | 1,100.39 mi (1,770.91 km) |
| Portimao to Cremona | 1,109.37 mi (1,785.36 km) |
| Portimao to Crevalcore | 1,149.40 mi (1,849.79 km) |
| Portimao to Crispiano | 1,401.68 mi (2,255.79 km) |
| Portimao to Crosia | 1,376.77 mi (2,215.69 km) |
| Portimao to Crotone | 1,396.53 mi (2,247.50 km) |
| Portimao to Cuneo | 977.01 mi (1,572.35 km) |
| Portimao to Cuorgne | 1,012.87 mi (1,630.06 km) |
| Portimao to Cusano Milanino | 1,083.95 mi (1,744.45 km) |
| Portimao to Cutro | 1,389.50 mi (2,236.18 km) |
