| Porsgrunn to Jacksonville (Texas) | 4,837.37 mi (7,784.99 km) |
| Porsgrunn to Jacksonville Beach (Florida) | 4,484.66 mi (7,217.36 km) |
| Porsgrunn to James Island (South Carolina) | 4,296.09 mi (6,913.90 km) |
| Porsgrunn to Jamestown (New York) | 3,757.63 mi (6,047.32 km) |
| Porsgrunn to Jamestown (North Dakota) | 4,072.17 mi (6,553.52 km) |
| Porsgrunn to Janesville (Wisconsin) | 4,032.14 mi (6,489.10 km) |
| Porsgrunn to Jasmine Estates (Florida) | 4,641.68 mi (7,470.06 km) |
| Porsgrunn to Jasper (Alabama) | 4,475.25 mi (7,202.22 km) |
| Porsgrunn to Jasper (Indiana) | 4,207.48 mi (6,771.28 km) |
| Porsgrunn to Jefferson (Georgia) | 4,339.23 mi (6,983.32 km) |
| Porsgrunn to Jefferson (Louisiana) | 4,792.71 mi (7,713.12 km) |
| Porsgrunn to Jefferson City (Missouri) | 4,360.05 mi (7,016.82 km) |
| Porsgrunn to Jefferson Hills (Pennsylvania) | 3,877.62 mi (6,240.43 km) |
| Porsgrunn to Jefferson Valley-Yorktown (New York) | 3,620.27 mi (5,826.26 km) |
| Porsgrunn to Jeffersontown (Kentucky) | 4,174.52 mi (6,718.24 km) |
