| Southend to Opole | 747.89 mi (1,203.62 km) |
| Southend to Orzesze | 790.81 mi (1,272.69 km) |
| Southend to Osowa | 762.70 mi (1,227.44 km) |
| Southend to Ostroda | 818.55 mi (1,317.33 km) |
| Southend to Ostroleka | 884.10 mi (1,422.82 km) |
| Southend to Ostrow Mazowiecka | 898.70 mi (1,446.32 km) |
| Southend to Ostrow Wielkopolski | 732.52 mi (1,178.87 km) |
| Southend to Ostrowiec Swietokrzyski | 892.97 mi (1,437.10 km) |
| Southend to Ostrzeszow | 739.42 mi (1,189.97 km) |
| Southend to Oswiecim | 812.97 mi (1,308.35 km) |
| Southend to Otwock | 875.63 mi (1,409.19 km) |
| Southend to Ozarow Mazowiecki | 855.30 mi (1,376.47 km) |
| Southend to Ozimek | 759.82 mi (1,222.81 km) |
| Southend to Ozorkow | 792.69 mi (1,275.71 km) |
| Southend to Pabianice | 799.25 mi (1,286.27 km) |
