| Steenokkerzeel to Oria | 955.89 mi (1,538.36 km) |
| Steenokkerzeel to Oristano | 785.96 mi (1,264.89 km) |
| Steenokkerzeel to Orta Nova | 850.51 mi (1,368.76 km) |
| Steenokkerzeel to Orte | 692.63 mi (1,114.68 km) |
| Steenokkerzeel to Ortona | 754.11 mi (1,213.62 km) |
| Steenokkerzeel to Orvieto | 670.19 mi (1,078.57 km) |
| Steenokkerzeel to Orzinuovi | 455.70 mi (733.39 km) |
| Steenokkerzeel to Osimo | 663.43 mi (1,067.68 km) |
| Steenokkerzeel to Ospitaletto | 450.18 mi (724.50 km) |
| Steenokkerzeel to Ostuni | 941.44 mi (1,515.11 km) |
| Steenokkerzeel to Ottaviano | 843.27 mi (1,357.12 km) |
| Steenokkerzeel to Ovada | 474.33 mi (763.36 km) |
| Steenokkerzeel to Ozieri | 745.81 mi (1,200.26 km) |
| Steenokkerzeel to Paceco | 976.42 mi (1,571.40 km) |
| Steenokkerzeel to Pachino | 1,111.74 mi (1,789.17 km) |
