| Boortmeerbeek to Orzesze | 624.14 mi (1,004.46 km) |
| Boortmeerbeek to Osowa | 627.51 mi (1,009.88 km) |
| Boortmeerbeek to Ostroda | 675.10 mi (1,086.47 km) |
| Boortmeerbeek to Ostroleka | 735.09 mi (1,183.01 km) |
| Boortmeerbeek to Ostrow Mazowiecka | 747.79 mi (1,203.45 km) |
| Boortmeerbeek to Ostrow Wielkopolski | 573.24 mi (922.54 km) |
| Boortmeerbeek to Ostrowiec Swietokrzyski | 731.01 mi (1,176.45 km) |
| Boortmeerbeek to Ostrzeszow | 578.66 mi (931.27 km) |
| Boortmeerbeek to Oswiecim | 646.13 mi (1,039.85 km) |
| Boortmeerbeek to Otwock | 720.15 mi (1,158.96 km) |
| Boortmeerbeek to Ozarow Mazowiecki | 700.38 mi (1,127.15 km) |
| Boortmeerbeek to Ozimek | 595.10 mi (957.72 km) |
| Boortmeerbeek to Ozorkow | 635.86 mi (1,023.32 km) |
| Boortmeerbeek to Pabianice | 640.40 mi (1,030.62 km) |
| Boortmeerbeek to Parczew | 789.62 mi (1,270.77 km) |
