| Porsgrunn to Coudekerque-Branche | 628.66 mi (1,011.73 km) |
| Porsgrunn to Coueron | 945.88 mi (1,522.25 km) |
| Porsgrunn to Coulommiers | 760.03 mi (1,223.15 km) |
| Porsgrunn to Courbevoic | 767.06 mi (1,234.46 km) |
| Porsgrunn to Courcouronnes | 782.15 mi (1,258.74 km) |
| Porsgrunn to Cournon-d'Auvergne | 962.78 mi (1,549.45 km) |
| Porsgrunn to Courrieres | 655.27 mi (1,054.56 km) |
| Porsgrunn to Coutras | 1,055.82 mi (1,699.18 km) |
| Porsgrunn to Couzeix | 979.88 mi (1,576.97 km) |
| Porsgrunn to Cran-Gevrier | 925.03 mi (1,488.69 km) |
| Porsgrunn to Craponne | 946.73 mi (1,523.62 km) |
| Porsgrunn to Creil | 740.08 mi (1,191.05 km) |
| Porsgrunn to Crepy-en-Valois | 735.46 mi (1,183.61 km) |
| Porsgrunn to Crest | 1,013.32 mi (1,630.78 km) |
| Porsgrunn to Creteil | 770.75 mi (1,240.40 km) |
