| Porvoo to Orzesze | 757.35 mi (1,218.83 km) |
| Porvoo to Osowa | 490.95 mi (790.11 km) |
| Porvoo to Ostroda | 509.25 mi (819.56 km) |
| Porvoo to Ostroleka | 529.32 mi (851.86 km) |
| Porvoo to Ostrow Mazowiecka | 543.68 mi (874.97 km) |
| Porvoo to Ostrow Wielkopolski | 674.87 mi (1,086.10 km) |
| Porvoo to Ostrowiec Swietokrzyski | 674.14 mi (1,084.92 km) |
| Porvoo to Ostrzeszow | 687.71 mi (1,106.76 km) |
| Porvoo to Oswiecim | 758.41 mi (1,220.54 km) |
| Porvoo to Otwock | 595.98 mi (959.14 km) |
| Porvoo to Ozarow Mazowiecki | 594.59 mi (956.90 km) |
| Porvoo to Ozimek | 731.06 mi (1,176.52 km) |
| Porvoo to Ozorkow | 631.19 mi (1,015.80 km) |
| Porvoo to Pabianice | 650.34 mi (1,046.62 km) |
| Porvoo to Parczew | 614.76 mi (989.35 km) |
