| Oud-Heverlee to Nowy Sacz | 712.04 mi (1,145.92 km) |
| Oud-Heverlee to Nowy Targ | 684.85 mi (1,102.17 km) |
| Oud-Heverlee to Nowy Tomysl | 502.37 mi (808.48 km) |
| Oud-Heverlee to Nysa | 554.79 mi (892.85 km) |
| Oud-Heverlee to Oborniki | 534.05 mi (859.47 km) |
| Oud-Heverlee to Oborniki Slaskie | 531.60 mi (855.52 km) |
| Oud-Heverlee to Olawa | 550.07 mi (885.25 km) |
| Oud-Heverlee to Olecko | 780.69 mi (1,256.40 km) |
| Oud-Heverlee to Olesnica | 552.63 mi (889.37 km) |
| Oud-Heverlee to Olesno | 598.89 mi (963.82 km) |
| Oud-Heverlee to Olkusz | 653.97 mi (1,052.46 km) |
| Oud-Heverlee to Olsztyn | 696.63 mi (1,121.12 km) |
| Oud-Heverlee to Opalenica | 514.04 mi (827.27 km) |
| Oud-Heverlee to Opoczno | 677.41 mi (1,090.18 km) |
| Oud-Heverlee to Opole | 579.29 mi (932.28 km) |
