| Ostrow Mazowiecka to Mouscron | 809.14 mi (1,302.19 km) |
| Ostrow Mazowiecka to Namur | 746.16 mi (1,200.82 km) |
| Ostrow Mazowiecka to Neder-Over-Heembeek | 757.08 mi (1,218.41 km) |
| Ostrow Mazowiecka to Neerpelt | 706.91 mi (1,137.66 km) |
| Ostrow Mazowiecka to Nevele | 789.26 mi (1,270.20 km) |
| Ostrow Mazowiecka to Niel | 754.98 mi (1,215.02 km) |
| Ostrow Mazowiecka to Nieuwpoort | 821.11 mi (1,321.44 km) |
| Ostrow Mazowiecka to Nijlen | 740.83 mi (1,192.25 km) |
| Ostrow Mazowiecka to Ninove | 773.72 mi (1,245.18 km) |
| Ostrow Mazowiecka to Nivelles | 766.46 mi (1,233.50 km) |
| Ostrow Mazowiecka to Olen | 732.79 mi (1,179.31 km) |
| Ostrow Mazowiecka to Oostakker | 778.95 mi (1,253.60 km) |
| Ostrow Mazowiecka to Oosterzele | 780.44 mi (1,255.99 km) |
| Ostrow Mazowiecka to Oostkamp | 800.14 mi (1,287.70 km) |
| Ostrow Mazowiecka to Opglabbeek | 704.08 mi (1,133.12 km) |
