| Blackburn to Orbetello | 1,001.35 mi (1,611.53 km) |
| Blackburn to Oria | 1,307.40 mi (2,104.06 km) |
| Blackburn to Oristano | 1,087.38 mi (1,749.97 km) |
| Blackburn to Orta Nova | 1,199.98 mi (1,931.19 km) |
| Blackburn to Orte | 1,034.49 mi (1,664.85 km) |
| Blackburn to Ortona | 1,102.87 mi (1,774.89 km) |
| Blackburn to Orvieto | 1,011.82 mi (1,628.37 km) |
| Blackburn to Orzinuovi | 799.13 mi (1,286.07 km) |
| Blackburn to Osimo | 1,012.89 mi (1,630.10 km) |
| Blackburn to Ospitaletto | 795.21 mi (1,279.76 km) |
| Blackburn to Ostuni | 1,293.23 mi (2,081.25 km) |
| Blackburn to Ottaviano | 1,187.90 mi (1,911.73 km) |
| Blackburn to Ovada | 803.40 mi (1,292.94 km) |
| Blackburn to Ozieri | 1,054.49 mi (1,697.03 km) |
| Blackburn to Paceco | 1,301.56 mi (2,094.66 km) |
