| Ostend to Orzesze | 695.57 mi (1,119.41 km) |
| Ostend to Osowa | 684.19 mi (1,101.10 km) |
| Ostend to Ostroda | 735.76 mi (1,184.10 km) |
| Ostend to Ostroleka | 798.44 mi (1,284.96 km) |
| Ostend to Ostrow Mazowiecka | 812.03 mi (1,306.84 km) |
| Ostend to Ostrow Wielkopolski | 641.17 mi (1,031.87 km) |
| Ostend to Ostrowiec Swietokrzyski | 800.33 mi (1,288.01 km) |
| Ostend to Ostrzeszow | 647.30 mi (1,041.73 km) |
| Ostend to Oswiecim | 717.64 mi (1,154.93 km) |
| Ostend to Otwock | 786.47 mi (1,265.70 km) |
| Ostend to Ozarow Mazowiecki | 766.42 mi (1,233.44 km) |
| Ostend to Ozimek | 665.61 mi (1,071.20 km) |
| Ostend to Ozorkow | 702.72 mi (1,130.92 km) |
| Ostend to Pabianice | 708.21 mi (1,139.75 km) |
| Ostend to Parczew | 857.08 mi (1,379.34 km) |
