| Porsgrunn to Clarkston (Georgia) | 4,378.65 mi (7,046.76 km) |
| Porsgrunn to Clarksville (Indiana) | 4,174.26 mi (6,717.82 km) |
| Porsgrunn to Clarksville (Tennessee) | 4,322.99 mi (6,957.18 km) |
| Porsgrunn to Clawson (Michigan) | 3,859.03 mi (6,210.51 km) |
| Porsgrunn to Clay (Alabama) | 4,462.69 mi (7,182.00 km) |
| Porsgrunn to Clayton (California) | 5,182.58 mi (8,340.56 km) |
| Porsgrunn to Clayton (Missouri) | 4,299.15 mi (6,918.82 km) |
| Porsgrunn to Clayton (North Carolina) | 4,082.72 mi (6,570.50 km) |
| Porsgrunn to Clayton (Ohio) | 4,042.48 mi (6,505.74 km) |
| Porsgrunn to Clearfield (Utah) | 4,757.32 mi (7,656.16 km) |
| Porsgrunn to Clearlake (California) | 5,133.00 mi (8,260.76 km) |
| Porsgrunn to Clearwater (Florida) | 4,662.14 mi (7,502.99 km) |
| Porsgrunn to Cleburne (Texas) | 4,880.25 mi (7,854.00 km) |
| Porsgrunn to Clemmons (North Carolina) | 4,126.69 mi (6,641.27 km) |
| Porsgrunn to Clemson (South Carolina) | 4,282.40 mi (6,891.85 km) |
