| Portimao to Cividale del Friuli | 1,286.72 mi (2,070.78 km) |
| Portimao to Civita Castellana | 1,165.49 mi (1,875.68 km) |
| Portimao to Civitanova Marche | 1,245.20 mi (2,003.96 km) |
| Portimao to Civitavecchia | 1,132.28 mi (1,822.23 km) |
| Portimao to Civitella in Val di Chiana | 1,148.77 mi (1,848.77 km) |
| Portimao to Clusone | 1,127.29 mi (1,814.20 km) |
| Portimao to Coccaglio | 1,119.06 mi (1,800.96 km) |
| Portimao to Codigoro | 1,196.76 mi (1,925.99 km) |
| Portimao to Codogno | 1,095.46 mi (1,762.98 km) |
| Portimao to Codroipo | 1,262.98 mi (2,032.57 km) |
| Portimao to Cogoleto | 1,026.53 mi (1,652.03 km) |
| Portimao to Colle di Val d'Elsa | 1,120.26 mi (1,802.89 km) |
| Portimao to Colle Salvetti | 1,093.08 mi (1,759.14 km) |
| Portimao to Collecchio | 1,107.48 mi (1,782.31 km) |
| Portimao to Colleferro | 1,189.73 mi (1,914.69 km) |
