| Porsgrunn to River Ridge (Louisiana) | 4,794.90 mi (7,716.65 km) |
| Porsgrunn to Riverbank (California) | 5,174.60 mi (8,327.72 km) |
| Porsgrunn to Riverdale (Georgia) | 4,398.29 mi (7,078.36 km) |
| Porsgrunn to Riverdale (Illinois) | 4,047.85 mi (6,514.39 km) |
| Porsgrunn to Riverside (California) | 5,331.27 mi (8,579.85 km) |
| Porsgrunn to Riverside (Ohio) | 4,040.59 mi (6,502.70 km) |
| Porsgrunn to Riverton (Utah) | 4,791.60 mi (7,711.33 km) |
| Porsgrunn to Riverton (Wyoming) | 4,550.72 mi (7,323.68 km) |
| Porsgrunn to Riverview (Florida) | 4,655.52 mi (7,492.33 km) |
| Porsgrunn to Riverview (Michigan) | 3,880.22 mi (6,244.61 km) |
| Porsgrunn to Riviera Beach (Florida) | 4,639.18 mi (7,466.03 km) |
| Porsgrunn to Riviera Beach (Maryland) | 3,826.53 mi (6,158.20 km) |
| Porsgrunn to Roanoke (Virginia) | 4,043.47 mi (6,507.34 km) |
| Porsgrunn to Roanoke Rapids (North Carolina) | 4,012.42 mi (6,457.37 km) |
| Porsgrunn to Robbinsdale (Minnesota) | 4,029.22 mi (6,484.40 km) |
