| Barnstaple to Octeville | 146.38 mi (235.58 km) |
| Barnstaple to Oignies | 310.94 mi (500.41 km) |
| Barnstaple to Oissel | 257.42 mi (414.27 km) |
| Barnstaple to Olivet | 347.66 mi (559.50 km) |
| Barnstaple to Ollioules | 718.47 mi (1,156.26 km) |
| Barnstaple to Olonne-sur-Mer | 330.71 mi (532.23 km) |
| Barnstaple to Oloron-Sainte-Marie | 568.35 mi (914.67 km) |
| Barnstaple to Onet Village | 557.04 mi (896.48 km) |
| Barnstaple to Onnaing | 338.13 mi (544.17 km) |
| Barnstaple to Orange | 632.14 mi (1,017.33 km) |
| Barnstaple to Orchies | 321.71 mi (517.75 km) |
| Barnstaple to Orleans | 346.17 mi (557.11 km) |
| Barnstaple to Orly | 329.20 mi (529.80 km) |
| Barnstaple to Ormesson-sur-Marne | 333.36 mi (536.48 km) |
| Barnstaple to Orsay | 322.99 mi (519.81 km) |
