| Porsgrunn to Carson (California) | 5,358.20 mi (8,623.18 km) |
| Porsgrunn to Carson City (Nevada) | 5,058.29 mi (8,140.53 km) |
| Porsgrunn to Carteret (New Jersey) | 3,673.45 mi (5,911.85 km) |
| Porsgrunn to Cartersville (Georgia) | 4,377.07 mi (7,044.21 km) |
| Porsgrunn to Carthage (Missouri) | 4,506.54 mi (7,252.57 km) |
| Porsgrunn to Cary (Illinois) | 4,035.11 mi (6,493.88 km) |
| Porsgrunn to Cary (North Carolina) | 4,088.31 mi (6,579.50 km) |
| Porsgrunn to Casa de Oro-Mount Helix (California) | 5,394.54 mi (8,681.68 km) |
| Porsgrunn to Casa Grande (Arizona) | 5,253.84 mi (8,455.24 km) |
| Porsgrunn to Casas Adobes (Arizona) | 5,268.84 mi (8,479.37 km) |
| Porsgrunn to Cascades (Virginia) | 3,861.48 mi (6,214.46 km) |
| Porsgrunn to Casper (Wyoming) | 4,509.52 mi (7,257.37 km) |
| Porsgrunn to Casselberry (Florida) | 4,574.06 mi (7,361.24 km) |
| Porsgrunn to Castaic (California) | 5,326.55 mi (8,572.25 km) |
| Porsgrunn to Castle Pines (Colorado) | 4,672.70 mi (7,519.99 km) |
