| Oud-Heverlee to Orzesze | 619.90 mi (997.64 km) |
| Oud-Heverlee to Osowa | 628.56 mi (1,011.56 km) |
| Oud-Heverlee to Ostroda | 675.05 mi (1,086.39 km) |
| Oud-Heverlee to Ostroleka | 734.21 mi (1,181.59 km) |
| Oud-Heverlee to Ostrow Mazowiecka | 746.61 mi (1,201.55 km) |
| Oud-Heverlee to Ostrow Wielkopolski | 570.80 mi (918.61 km) |
| Oud-Heverlee to Ostrowiec Swietokrzyski | 727.89 mi (1,171.43 km) |
| Oud-Heverlee to Ostrzeszow | 575.92 mi (926.85 km) |
| Oud-Heverlee to Oswiecim | 641.83 mi (1,032.93 km) |
| Oud-Heverlee to Otwock | 718.26 mi (1,155.93 km) |
| Oud-Heverlee to Ozarow Mazowiecki | 698.60 mi (1,124.29 km) |
| Oud-Heverlee to Ozimek | 591.42 mi (951.80 km) |
| Oud-Heverlee to Ozorkow | 633.81 mi (1,020.02 km) |
| Oud-Heverlee to Pabianice | 637.97 mi (1,026.71 km) |
| Oud-Heverlee to Parczew | 787.27 mi (1,266.99 km) |
