| Porsgrunn to Corinth (Mississippi) | 4,452.56 mi (7,165.70 km) |
| Porsgrunn to Corinth (Texas) | 4,823.36 mi (7,762.45 km) |
| Porsgrunn to Cornelius (North Carolina) | 4,174.29 mi (6,717.86 km) |
| Porsgrunn to Cornelius (Oregon) | 4,725.99 mi (7,605.75 km) |
| Porsgrunn to Corning (New York) | 3,684.01 mi (5,928.84 km) |
| Porsgrunn to Corona (California) | 5,340.16 mi (8,594.15 km) |
| Porsgrunn to Coronado (California) | 5,405.44 mi (8,699.21 km) |
| Porsgrunn to Corpus Christi (Texas) | 5,153.51 mi (8,293.77 km) |
| Porsgrunn to Corsicana (Texas) | 4,867.50 mi (7,833.49 km) |
| Porsgrunn to Cortland (New York) | 3,631.23 mi (5,843.90 km) |
| Porsgrunn to Corvallis (Oregon) | 4,790.46 mi (7,709.50 km) |
| Porsgrunn to Coshocton (Ohio) | 3,941.37 mi (6,343.03 km) |
| Porsgrunn to Costa Mesa (California) | 5,360.75 mi (8,627.30 km) |
| Porsgrunn to Coto de Caza (California) | 5,357.34 mi (8,621.80 km) |
| Porsgrunn to Cottage Grove (Minnesota) | 4,029.27 mi (6,484.49 km) |
