| Santander to Octeville | 438.06 mi (704.99 km) |
| Santander to Oignies | 580.07 mi (933.53 km) |
| Santander to Oissel | 468.19 mi (753.49 km) |
| Santander to Olivet | 410.11 mi (660.00 km) |
| Santander to Ollioules | 485.57 mi (781.45 km) |
| Santander to Olonne-sur-Mer | 234.39 mi (377.21 km) |
| Santander to Oloron-Sainte-Marie | 161.81 mi (260.40 km) |
| Santander to Onet Village | 324.44 mi (522.14 km) |
| Santander to Onnaing | 591.79 mi (952.40 km) |
| Santander to Orange | 431.93 mi (695.12 km) |
| Santander to Orchies | 586.94 mi (944.58 km) |
| Santander to Orleans | 412.29 mi (663.52 km) |
| Santander to Orly | 470.10 mi (756.55 km) |
| Santander to Ormesson-sur-Marne | 476.67 mi (767.12 km) |
| Santander to Orsay | 461.57 mi (742.82 km) |
