| Porsgrunn to Norton Shores (Michigan) | 3,921.59 mi (6,311.19 km) |
| Porsgrunn to Norwalk (California) | 5,349.71 mi (8,609.52 km) |
| Porsgrunn to Norwalk (Connecticut) | 3,618.35 mi (5,823.17 km) |
| Porsgrunn to Norwalk (Iowa) | 4,239.01 mi (6,822.02 km) |
| Porsgrunn to Norwalk (Ohio) | 3,912.14 mi (6,295.98 km) |
| Porsgrunn to Norwich (Connecticut) | 3,550.68 mi (5,714.26 km) |
| Porsgrunn to Norwood (Ohio) | 4,085.66 mi (6,575.23 km) |
| Porsgrunn to Novato (California) | 5,186.45 mi (8,346.79 km) |
| Porsgrunn to Novi (Michigan) | 3,872.87 mi (6,232.78 km) |
| Porsgrunn to O'Fallon (Illinois) | 4,288.99 mi (6,902.45 km) |
| Porsgrunn to O'Fallon (Missouri) | 4,303.09 mi (6,925.15 km) |
| Porsgrunn to Oak Creek (Wisconsin) | 3,987.57 mi (6,417.37 km) |
| Porsgrunn to Oak Forest (Illinois) | 4,053.57 mi (6,523.60 km) |
| Porsgrunn to Oak Grove (Oregon) | 4,724.30 mi (7,603.03 km) |
| Porsgrunn to Oak Grove (South Carolina) | 4,266.76 mi (6,866.69 km) |
