| Porsgrunn to Orzesze | 715.82 mi (1,152.00 km) |
| Porsgrunn to Osowa | 462.95 mi (745.04 km) |
| Porsgrunn to Ostroda | 540.90 mi (870.49 km) |
| Porsgrunn to Ostroleka | 617.69 mi (994.08 km) |
| Porsgrunn to Ostrow Mazowiecka | 640.66 mi (1,031.04 km) |
| Porsgrunn to Ostrow Wielkopolski | 605.14 mi (973.89 km) |
| Porsgrunn to Ostrowiec Swietokrzyski | 728.61 mi (1,172.59 km) |
| Porsgrunn to Ostrzeszow | 621.69 mi (1,000.51 km) |
| Porsgrunn to Oswiecim | 732.21 mi (1,178.38 km) |
| Porsgrunn to Otwock | 659.43 mi (1,061.25 km) |
| Porsgrunn to Ozarow Mazowiecki | 641.80 mi (1,032.88 km) |
| Porsgrunn to Ozimek | 672.92 mi (1,082.95 km) |
| Porsgrunn to Ozorkow | 618.45 mi (995.31 km) |
| Porsgrunn to Pabianice | 639.15 mi (1,028.62 km) |
| Porsgrunn to Parczew | 728.36 mi (1,172.18 km) |
