| Porsgrunn to Cognac | 1,016.63 mi (1,636.11 km) |
| Porsgrunn to Cogolin | 1,104.34 mi (1,777.26 km) |
| Porsgrunn to Colmar | 768.33 mi (1,236.51 km) |
| Porsgrunn to Colombes | 765.40 mi (1,231.79 km) |
| Porsgrunn to Colomiers | 1,128.25 mi (1,815.75 km) |
| Porsgrunn to Combs-la-Ville | 777.17 mi (1,250.74 km) |
| Porsgrunn to Comines | 634.84 mi (1,021.68 km) |
| Porsgrunn to Compiegne | 724.68 mi (1,166.25 km) |
| Porsgrunn to Concarneau | 953.66 mi (1,534.77 km) |
| Porsgrunn to Conde-sur-l'Escaut | 645.88 mi (1,039.45 km) |
| Porsgrunn to Conflans-Sainte-Honorine | 762.96 mi (1,227.86 km) |
| Porsgrunn to Corbas | 950.38 mi (1,529.49 km) |
| Porsgrunn to Corbeil-Essonnes | 782.01 mi (1,258.52 km) |
| Porsgrunn to Cormeilles-en-Parisis | 762.95 mi (1,227.84 km) |
| Porsgrunn to Cosne sur Loire | 854.93 mi (1,375.88 km) |
