| Porsgrunn to Cervignano del Friuli | 930.67 mi (1,497.76 km) |
| Porsgrunn to Cesa | 1,269.22 mi (2,042.61 km) |
| Porsgrunn to Cesano Maderno | 932.01 mi (1,499.93 km) |
| Porsgrunn to Cesena | 1,040.30 mi (1,674.19 km) |
| Porsgrunn to Cesenatico | 1,036.76 mi (1,668.50 km) |
| Porsgrunn to Cetraro | 1,382.71 mi (2,225.26 km) |
| Porsgrunn to Cherasco | 1,002.47 mi (1,613.31 km) |
| Porsgrunn to Chiampo | 939.58 mi (1,512.10 km) |
| Porsgrunn to Chiaravalle | 1,082.97 mi (1,742.86 km) |
| Porsgrunn to Chiari | 939.41 mi (1,511.84 km) |
| Porsgrunn to Chiavari | 1,022.63 mi (1,645.76 km) |
| Porsgrunn to Chieri | 977.53 mi (1,573.18 km) |
| Porsgrunn to Chieti | 1,174.03 mi (1,889.42 km) |
| Porsgrunn to Chioggia | 966.09 mi (1,554.77 km) |
| Porsgrunn to Chiusi | 1,116.41 mi (1,796.69 km) |
