| Porsgrunn to Cartagena | 1,561.02 mi (2,512.23 km) |
| Porsgrunn to Cartama | 1,676.15 mi (2,697.50 km) |
| Porsgrunn to Cartaya | 1,685.52 mi (2,712.58 km) |
| Porsgrunn to Caspe | 1,305.42 mi (2,100.88 km) |
| Porsgrunn to Cassa de la Selva | 1,226.01 mi (1,973.08 km) |
| Porsgrunn to Castalla | 1,490.12 mi (2,398.11 km) |
| Porsgrunn to Castellbisbal | 1,263.56 mi (2,033.51 km) |
| Porsgrunn to Castelldefels | 1,276.89 mi (2,054.95 km) |
| Porsgrunn to Castello de Ampurias | 1,198.98 mi (1,929.58 km) |
| Porsgrunn to Castellon de la Plana | 1,388.82 mi (2,235.09 km) |
| Porsgrunn to Castilleja de la Cuesta | 1,657.79 mi (2,667.96 km) |
| Porsgrunn to Catarroja | 1,432.61 mi (2,305.57 km) |
| Porsgrunn to Catral | 1,521.19 mi (2,448.12 km) |
| Porsgrunn to Caudete | 1,487.30 mi (2,393.58 km) |
| Porsgrunn to Cehegin | 1,539.70 mi (2,477.91 km) |
