| Porsgrunn to Rosemont (California) | 5,131.64 mi (8,258.58 km) |
| Porsgrunn to Rosemount (Minnesota) | 4,037.16 mi (6,497.18 km) |
| Porsgrunn to Rosenberg (Texas) | 4,997.19 mi (8,042.19 km) |
| Porsgrunn to Roseville (California) | 5,116.80 mi (8,234.69 km) |
| Porsgrunn to Roseville (Michigan) | 3,853.88 mi (6,202.23 km) |
| Porsgrunn to Roseville (Minnesota) | 4,024.68 mi (6,477.09 km) |
| Porsgrunn to Rossmoor (California) | 5,357.07 mi (8,621.38 km) |
| Porsgrunn to Rossville (Maryland) | 3,814.36 mi (6,138.62 km) |
| Porsgrunn to Roswell (Georgia) | 4,369.43 mi (7,031.91 km) |
| Porsgrunn to Roswell (New Mexico) | 5,028.38 mi (8,092.39 km) |
| Porsgrunn to Round Lake (Illinois) | 4,023.49 mi (6,475.19 km) |
| Porsgrunn to Round Lake Beach (Illinois) | 4,020.76 mi (6,470.79 km) |
| Porsgrunn to Round Rock (Texas) | 4,996.05 mi (8,040.37 km) |
| Porsgrunn to Rowland Heights (California) | 5,341.07 mi (8,595.62 km) |
| Porsgrunn to Rowlett (Texas) | 4,821.00 mi (7,758.64 km) |
