| Birkenhead to Opole | 906.66 mi (1,459.12 km) |
| Birkenhead to Orzesze | 953.04 mi (1,533.77 km) |
| Birkenhead to Osowa | 873.91 mi (1,406.43 km) |
| Birkenhead to Ostroda | 939.55 mi (1,512.07 km) |
| Birkenhead to Ostroleka | 1,011.86 mi (1,628.44 km) |
| Birkenhead to Ostrow Mazowiecka | 1,029.19 mi (1,656.33 km) |
| Birkenhead to Ostrow Wielkopolski | 880.75 mi (1,417.44 km) |
| Birkenhead to Ostrowiec Swietokrzyski | 1,043.29 mi (1,679.01 km) |
| Birkenhead to Ostrzeszow | 890.15 mi (1,432.55 km) |
| Birkenhead to Oswiecim | 975.31 mi (1,569.61 km) |
| Birkenhead to Otwock | 1,014.22 mi (1,632.23 km) |
| Birkenhead to Ozarow Mazowiecki | 993.35 mi (1,598.64 km) |
| Birkenhead to Ozimek | 918.01 mi (1,477.40 km) |
| Birkenhead to Ozorkow | 935.33 mi (1,505.26 km) |
| Birkenhead to Pabianice | 945.29 mi (1,521.29 km) |
