| Blackburn to Octeville | 286.99 mi (461.87 km) |
| Blackburn to Oignies | 324.34 mi (521.98 km) |
| Blackburn to Oissel | 340.86 mi (548.56 km) |
| Blackburn to Olivet | 449.13 mi (722.80 km) |
| Blackburn to Ollioules | 825.13 mi (1,327.92 km) |
| Blackburn to Olonne-sur-Mer | 499.28 mi (803.51 km) |
| Blackburn to Oloron-Sainte-Marie | 734.17 mi (1,181.53 km) |
| Blackburn to Onet Village | 687.35 mi (1,106.18 km) |
| Blackburn to Onnaing | 347.04 mi (558.51 km) |
| Blackburn to Orange | 740.94 mi (1,192.43 km) |
| Blackburn to Orchies | 331.75 mi (533.91 km) |
| Blackburn to Orleans | 446.84 mi (719.12 km) |
| Blackburn to Orly | 404.75 mi (651.38 km) |
| Blackburn to Ormesson-sur-Marne | 405.55 mi (652.66 km) |
| Blackburn to Orsay | 403.00 mi (648.56 km) |
