| Porsgrunn to Centralia (Illinois) | 4,268.67 mi (6,869.76 km) |
| Porsgrunn to Centralia (Washington) | 4,648.45 mi (7,480.97 km) |
| Porsgrunn to Centreville (Virginia) | 3,874.46 mi (6,235.34 km) |
| Porsgrunn to Ceres (California) | 5,183.28 mi (8,341.69 km) |
| Porsgrunn to Cerritos (California) | 5,351.82 mi (8,612.93 km) |
| Porsgrunn to Chalco (Nebraska) | 4,327.91 mi (6,965.10 km) |
| Porsgrunn to Chalmette (Louisiana) | 4,787.57 mi (7,704.86 km) |
| Porsgrunn to Chambersburg (Pennsylvania) | 3,822.45 mi (6,151.65 km) |
| Porsgrunn to Chamblee (Georgia) | 4,376.53 mi (7,043.35 km) |
| Porsgrunn to Champaign (Illinois) | 4,152.77 mi (6,683.24 km) |
| Porsgrunn to Champlin (Minnesota) | 4,022.80 mi (6,474.07 km) |
| Porsgrunn to Chandler (Arizona) | 5,233.00 mi (8,421.71 km) |
| Porsgrunn to Chanhassen (Minnesota) | 4,045.38 mi (6,510.41 km) |
| Porsgrunn to Channahon (Illinois) | 4,079.42 mi (6,565.19 km) |
| Porsgrunn to Channelview (Texas) | 4,960.56 mi (7,983.24 km) |
