| Barnstaple to Opwijk | 358.15 mi (576.39 km) |
| Barnstaple to Ostend | 302.53 mi (486.87 km) |
| Barnstaple to Oud-Heverlee | 379.97 mi (611.50 km) |
| Barnstaple to Oud-Turnhout | 391.63 mi (630.27 km) |
| Barnstaple to Oudenaarde | 333.55 mi (536.80 km) |
| Barnstaple to Oudenburg | 306.08 mi (492.58 km) |
| Barnstaple to Oupeye | 423.34 mi (681.30 km) |
| Barnstaple to Overijse | 374.55 mi (602.78 km) |
| Barnstaple to Overpelt | 410.57 mi (660.75 km) |
| Barnstaple to Paal | 400.69 mi (644.85 km) |
| Barnstaple to Peer | 412.45 mi (663.77 km) |
| Barnstaple to Pepinster | 432.22 mi (695.59 km) |
| Barnstaple to Peruwelz | 335.89 mi (540.57 km) |
| Barnstaple to Perwez | 388.17 mi (624.70 km) |
| Barnstaple to Philippeville | 381.91 mi (614.63 km) |
