| Portishead to Opole | 897.20 mi (1,443.91 km) |
| Portishead to Orzesze | 940.17 mi (1,513.06 km) |
| Portishead to Osowa | 903.17 mi (1,453.51 km) |
| Portishead to Ostroda | 961.96 mi (1,548.12 km) |
| Portishead to Ostroleka | 1,029.31 mi (1,656.52 km) |
| Portishead to Ostrow Mazowiecka | 1,044.54 mi (1,681.02 km) |
| Portishead to Ostrow Wielkopolski | 880.99 mi (1,417.81 km) |
| Portishead to Ostrowiec Swietokrzyski | 1,041.84 mi (1,676.68 km) |
| Portishead to Ostrzeszow | 888.17 mi (1,429.37 km) |
| Portishead to Oswiecim | 962.33 mi (1,548.71 km) |
| Portishead to Otwock | 1,022.95 mi (1,646.27 km) |
| Portishead to Ozarow Mazowiecki | 1,002.49 mi (1,613.35 km) |
| Portishead to Ozimek | 909.11 mi (1,463.07 km) |
| Portishead to Ozorkow | 940.51 mi (1,513.60 km) |
| Portishead to Pabianice | 947.55 mi (1,524.93 km) |
