| Porsgrunn to Caguas (Puerto Rico) | 4,638.75 mi (7,465.35 km) |
| Porsgrunn to Cahokia (Illinois) | 4,299.00 mi (6,918.56 km) |
| Porsgrunn to Calabasas (California) | 5,349.10 mi (8,608.54 km) |
| Porsgrunn to Caldwell (Idaho) | 4,709.19 mi (7,578.71 km) |
| Porsgrunn to Caledonia (Wisconsin) | 3,991.32 mi (6,423.41 km) |
| Porsgrunn to Calera (Alabama) | 4,499.62 mi (7,241.44 km) |
| Porsgrunn to Calexico (California) | 5,363.06 mi (8,631.01 km) |
| Porsgrunn to Calhoun (Georgia) | 4,363.08 mi (7,021.69 km) |
| Porsgrunn to California (Maryland) | 3,872.41 mi (6,232.05 km) |
| Porsgrunn to California City (California) | 5,266.16 mi (8,475.06 km) |
| Porsgrunn to Callaway (Florida) | 4,631.96 mi (7,454.42 km) |
| Porsgrunn to Calumet City (Illinois) | 4,046.90 mi (6,512.86 km) |
| Porsgrunn to Calverton (Maryland) | 3,846.28 mi (6,189.99 km) |
| Porsgrunn to Camano (Washington) | 4,546.70 mi (7,317.20 km) |
| Porsgrunn to Camarillo (California) | 5,352.25 mi (8,613.61 km) |
