| Cities | Distance |
|---|---|
| Hoeilaart to Oria | 949.97 mi (1,528.83 km) |
| Hoeilaart to Oristano | 776.38 mi (1,249.46 km) |
| Hoeilaart to Orta Nova | 844.13 mi (1,358.49 km) |
| Hoeilaart to Orte | 685.17 mi (1,102.67 km) |
| Hoeilaart to Ortona | 747.57 mi (1,203.10 km) |
| Hoeilaart to Orvieto | 662.70 mi (1,066.51 km) |
| Hoeilaart to Orzinuovi | 448.24 mi (721.37 km) |
| Hoeilaart to Osimo | 656.99 mi (1,057.32 km) |
| Hoeilaart to Ospitaletto | 442.91 mi (712.80 km) |
| Hoeilaart to Ostuni | 935.60 mi (1,505.69 km) |
| Hoeilaart to Ottaviano | 836.18 mi (1,345.70 km) |
| Hoeilaart to Ovada | 465.66 mi (749.40 km) |
| Hoeilaart to Ozieri | 736.43 mi (1,185.17 km) |
| Hoeilaart to Paceco | 967.88 mi (1,557.65 km) |
| Hoeilaart to Pachino | 1,103.82 mi (1,776.42 km) |