| Cities | Distance |
|---|---|
| Porsgrunn to Nottingham | 596.13 mi (959.39 km) |
| Porsgrunn to Nuneaton | 627.52 mi (1,009.90 km) |
| Porsgrunn to Oadby | 613.14 mi (986.75 km) |
| Porsgrunn to Oakengates | 645.23 mi (1,038.40 km) |
| Porsgrunn to Oakham | 600.33 mi (966.14 km) |
| Porsgrunn to Oldbury | 643.17 mi (1,035.08 km) |
| Porsgrunn to Oldham | 593.01 mi (954.36 km) |
| Porsgrunn to Ollerton | 579.67 mi (932.89 km) |
| Porsgrunn to Olton | 641.08 mi (1,031.72 km) |
| Porsgrunn to Omagh | 711.63 mi (1,145.27 km) |
| Porsgrunn to Ormesby | 517.66 mi (833.09 km) |
| Porsgrunn to Ormskirk | 614.53 mi (988.99 km) |
| Porsgrunn to Orpington | 653.92 mi (1,052.39 km) |
| Porsgrunn to Ossett | 570.89 mi (918.75 km) |
| Porsgrunn to Oswaldtwistle | 591.48 mi (951.89 km) |