| Portimao to Chivasso | 1,016.61 mi (1,636.08 km) |
| Portimao to Ciampino | 1,169.20 mi (1,881.64 km) |
| Portimao to Cicciano | 1,261.95 mi (2,030.92 km) |
| Portimao to Cingoli | 1,220.91 mi (1,964.86 km) |
| Portimao to Cinisello Balsamo | 1,085.40 mi (1,746.78 km) |
| Portimao to Cinisi | 1,183.15 mi (1,904.09 km) |
| Portimao to Cirie | 1,005.69 mi (1,618.50 km) |
| Portimao to Ciro Marina | 1,396.36 mi (2,247.23 km) |
| Portimao to Cislago | 1,077.67 mi (1,734.34 km) |
| Portimao to Cisterna di Latina | 1,178.70 mi (1,896.93 km) |
| Portimao to Cisternino | 1,412.41 mi (2,273.06 km) |
| Portimao to Citta di Castello | 1,175.11 mi (1,891.15 km) |
| Portimao to Citta Sant'Angelo | 1,250.54 mi (2,012.55 km) |
| Portimao to Cittadella | 1,201.48 mi (1,933.60 km) |
| Portimao to Cittanova | 1,343.86 mi (2,162.73 km) |
