| Santander to Oerlinghausen | 823.28 mi (1,324.94 km) |
| Santander to Oestrich-Winkel | 717.28 mi (1,154.34 km) |
| Santander to Offenburg | 660.25 mi (1,062.56 km) |
| Santander to Oftersheim | 716.15 mi (1,152.53 km) |
| Santander to Ohrdruf | 849.39 mi (1,366.97 km) |
| Santander to Ohringen | 746.76 mi (1,201.80 km) |
| Santander to Olbernhau | 944.42 mi (1,519.89 km) |
| Santander to Olching | 796.40 mi (1,281.69 km) |
| Santander to Oldenburg | 865.14 mi (1,392.30 km) |
| Santander to Oldenburg in Holstein | 999.07 mi (1,607.84 km) |
| Santander to Olfen | 770.98 mi (1,240.78 km) |
| Santander to Olpe | 753.63 mi (1,212.86 km) |
| Santander to Olsberg | 790.00 mi (1,271.39 km) |
| Santander to Oranienburg | 1,010.63 mi (1,626.44 km) |
| Santander to Ortenberg | 769.75 mi (1,238.79 km) |
