| Bideford to Orbetello | 937.30 mi (1,508.44 km) |
| Bideford to Oria | 1,271.49 mi (2,046.27 km) |
| Bideford to Oristano | 984.04 mi (1,583.65 km) |
| Bideford to Orta Nova | 1,158.54 mi (1,864.49 km) |
| Bideford to Orte | 979.60 mi (1,576.51 km) |
| Bideford to Ortona | 1,061.34 mi (1,708.07 km) |
| Bideford to Orvieto | 957.21 mi (1,540.47 km) |
| Bideford to Orzinuovi | 756.18 mi (1,216.95 km) |
| Bideford to Osimo | 975.70 mi (1,570.24 km) |
| Bideford to Ospitaletto | 755.46 mi (1,215.80 km) |
| Bideford to Ostuni | 1,258.77 mi (2,025.80 km) |
| Bideford to Ottaviano | 1,134.51 mi (1,825.82 km) |
| Bideford to Ovada | 739.72 mi (1,190.47 km) |
| Bideford to Ozieri | 958.58 mi (1,542.68 km) |
| Bideford to Paceco | 1,216.17 mi (1,957.24 km) |
