| Boortmeerbeek to Oria | 957.15 mi (1,540.38 km) |
| Boortmeerbeek to Oristano | 789.55 mi (1,270.65 km) |
| Boortmeerbeek to Orta Nova | 852.03 mi (1,371.21 km) |
| Boortmeerbeek to Orte | 694.79 mi (1,118.16 km) |
| Boortmeerbeek to Ortona | 755.72 mi (1,216.22 km) |
| Boortmeerbeek to Orvieto | 672.38 mi (1,082.09 km) |
| Boortmeerbeek to Orzinuovi | 457.89 mi (736.91 km) |
| Boortmeerbeek to Osimo | 664.99 mi (1,070.20 km) |
| Boortmeerbeek to Ospitaletto | 452.25 mi (727.83 km) |
| Boortmeerbeek to Ostuni | 942.66 mi (1,517.07 km) |
| Boortmeerbeek to Ottaviano | 845.21 mi (1,360.23 km) |
| Boortmeerbeek to Ovada | 477.28 mi (768.11 km) |
| Boortmeerbeek to Ozieri | 749.23 mi (1,205.77 km) |
| Boortmeerbeek to Paceco | 979.25 mi (1,575.96 km) |
| Boortmeerbeek to Pachino | 1,114.16 mi (1,793.07 km) |
