| Porsgrunn to Romeoville (Illinois) | 4,062.78 mi (6,538.41 km) |
| Porsgrunn to Romulus (Michigan) | 3,882.84 mi (6,248.82 km) |
| Porsgrunn to Ronkonkoma (New York) | 3,624.83 mi (5,833.60 km) |
| Porsgrunn to Roosevelt (New York) | 3,646.82 mi (5,868.98 km) |
| Porsgrunn to Rosamond (California) | 5,292.60 mi (8,517.62 km) |
| Porsgrunn to Rosaryville (Maryland) | 3,857.96 mi (6,208.79 km) |
| Porsgrunn to Roscoe (Illinois) | 4,046.41 mi (6,512.07 km) |
| Porsgrunn to Rose Hill (Virginia) | 3,866.27 mi (6,222.17 km) |
| Porsgrunn to Roseburg (Oregon) | 4,877.23 mi (7,849.15 km) |
| Porsgrunn to Rosedale (California) | 5,282.85 mi (8,501.93 km) |
| Porsgrunn to Rosedale (Maryland) | 3,817.07 mi (6,142.98 km) |
| Porsgrunn to Roselle (Illinois) | 4,042.98 mi (6,506.55 km) |
| Porsgrunn to Roselle (New Jersey) | 3,670.90 mi (5,907.74 km) |
| Porsgrunn to Roselle Park (New Jersey) | 3,670.45 mi (5,907.03 km) |
| Porsgrunn to Rosemead (California) | 5,339.51 mi (8,593.12 km) |
