| Porsgrunn to Cicero (Illinois) | 4,040.52 mi (6,502.58 km) |
| Porsgrunn to Cimarron Hills (Colorado) | 4,704.05 mi (7,570.43 km) |
| Porsgrunn to Cincinnati (Ohio) | 4,088.40 mi (6,579.64 km) |
| Porsgrunn to Cinco Ranch (Texas) | 4,983.82 mi (8,020.68 km) |
| Porsgrunn to Circleville (Ohio) | 4,012.29 mi (6,457.16 km) |
| Porsgrunn to Citrus (California) | 5,331.95 mi (8,580.95 km) |
| Porsgrunn to Citrus Heights (California) | 5,120.88 mi (8,241.27 km) |
| Porsgrunn to Citrus Park (Florida) | 4,649.98 mi (7,483.42 km) |
| Porsgrunn to Claiborne (Louisiana) | 4,708.19 mi (7,577.10 km) |
| Porsgrunn to Claremont (California) | 5,327.18 mi (8,573.26 km) |
| Porsgrunn to Claremont (New Hampshire) | 3,463.61 mi (5,574.14 km) |
| Porsgrunn to Claremore (Oklahoma) | 4,593.76 mi (7,392.94 km) |
| Porsgrunn to Clarksburg (Maryland) | 3,847.79 mi (6,192.41 km) |
| Porsgrunn to Clarksburg (West Virginia) | 3,945.20 mi (6,349.19 km) |
| Porsgrunn to Clarksdale (Mississippi) | 4,561.03 mi (7,340.27 km) |
