| Porvoo to Ciampino | 1,398.26 mi (2,250.29 km) |
| Porvoo to Cicciano | 1,423.48 mi (2,290.88 km) |
| Porvoo to Cingoli | 1,285.72 mi (2,069.16 km) |
| Porvoo to Cinisello Balsamo | 1,225.46 mi (1,972.18 km) |
| Porvoo to Cinisi | 1,630.36 mi (2,623.82 km) |
| Porvoo to Cirie | 1,281.55 mi (2,062.46 km) |
| Porvoo to Ciro Marina | 1,498.67 mi (2,411.88 km) |
| Porvoo to Cislago | 1,224.92 mi (1,971.32 km) |
| Porvoo to Cisterna di Latina | 1,408.21 mi (2,266.29 km) |
| Porvoo to Cisternino | 1,403.11 mi (2,258.09 km) |
| Porvoo to Citta di Castello | 1,296.47 mi (2,086.46 km) |
| Porvoo to Citta Sant'Angelo | 1,328.01 mi (2,137.22 km) |
| Porvoo to Cittadella | 1,165.33 mi (1,875.41 km) |
| Porvoo to Cittanova | 1,579.14 mi (2,541.38 km) |
| Porvoo to Cividale del Friuli | 1,105.45 mi (1,779.05 km) |
