| Porsgrunn to Castrovillari | 1,363.37 mi (2,194.13 km) |
| Porsgrunn to Catania | 1,512.66 mi (2,434.39 km) |
| Porsgrunn to Catanzaro | 1,429.45 mi (2,300.47 km) |
| Porsgrunn to Cattolica | 1,054.45 mi (1,696.97 km) |
| Porsgrunn to Cava de' Tirreni | 1,290.75 mi (2,077.26 km) |
| Porsgrunn to Cavallino | 1,350.58 mi (2,173.54 km) |
| Porsgrunn to Cavarzere | 970.90 mi (1,562.51 km) |
| Porsgrunn to Cave | 1,203.27 mi (1,936.47 km) |
| Porsgrunn to Cavriago | 996.62 mi (1,603.91 km) |
| Porsgrunn to Cavriglia | 1,080.40 mi (1,738.74 km) |
| Porsgrunn to Cazzago San Martino | 935.19 mi (1,505.05 km) |
| Porsgrunn to Ceccano | 1,222.55 mi (1,967.50 km) |
| Porsgrunn to Cecina | 1,092.14 mi (1,757.62 km) |
| Porsgrunn to Cefalu | 1,469.16 mi (2,364.38 km) |
| Porsgrunn to Ceglie Messapico | 1,320.03 mi (2,124.39 km) |
