| Porsgrunn to Chitila | 1,218.36 mi (1,960.76 km) |
| Porsgrunn to Cisnadie | 1,102.92 mi (1,774.98 km) |
| Porsgrunn to Cluj-Napoca | 1,025.93 mi (1,651.08 km) |
| Porsgrunn to Codlea | 1,133.79 mi (1,824.66 km) |
| Porsgrunn to Comanesti | 1,115.02 mi (1,794.46 km) |
| Porsgrunn to Comarnic | 1,165.19 mi (1,875.19 km) |
| Porsgrunn to Constanta | 1,303.77 mi (2,098.22 km) |
| Porsgrunn to Corabia | 1,230.53 mi (1,980.34 km) |
| Porsgrunn to Costesti | 1,183.25 mi (1,904.25 km) |
| Porsgrunn to Covasna | 1,142.63 mi (1,838.89 km) |
| Porsgrunn to Craiova | 1,181.00 mi (1,900.63 km) |
| Porsgrunn to Cristuru Secuiesc | 1,088.38 mi (1,751.57 km) |
| Porsgrunn to Cugir | 1,077.51 mi (1,734.08 km) |
| Porsgrunn to Cumpana | 1,305.00 mi (2,100.19 km) |
| Porsgrunn to Curtea de Arges | 1,149.92 mi (1,850.61 km) |
