| Blankenberge to Oria | 1,018.15 mi (1,638.55 km) |
| Blankenberge to Oristano | 829.97 mi (1,335.70 km) |
| Blankenberge to Orta Nova | 911.61 mi (1,467.09 km) |
| Blankenberge to Orte | 750.18 mi (1,207.29 km) |
| Blankenberge to Ortona | 814.80 mi (1,311.29 km) |
| Blankenberge to Orvieto | 727.61 mi (1,170.98 km) |
| Blankenberge to Orzinuovi | 513.49 mi (826.38 km) |
| Blankenberge to Osimo | 724.44 mi (1,165.87 km) |
| Blankenberge to Ospitaletto | 508.72 mi (818.70 km) |
| Blankenberge to Ostuni | 1,003.87 mi (1,615.57 km) |
| Blankenberge to Ottaviano | 902.14 mi (1,451.85 km) |
| Blankenberge to Ovada | 526.17 mi (846.80 km) |
| Blankenberge to Ozieri | 791.88 mi (1,274.41 km) |
| Blankenberge to Paceco | 1,028.39 mi (1,655.03 km) |
| Blankenberge to Pachino | 1,167.04 mi (1,878.16 km) |
