| Barnstaple to Oberkirch | 568.57 mi (915.02 km) |
| Barnstaple to Obernburg am Main | 586.15 mi (943.31 km) |
| Barnstaple to Obernkirchen | 569.74 mi (916.91 km) |
| Barnstaple to Oberschleissheim | 724.11 mi (1,165.35 km) |
| Barnstaple to Oberstdorf | 693.30 mi (1,115.76 km) |
| Barnstaple to Obertraubling | 733.39 mi (1,180.28 km) |
| Barnstaple to Obertshausen | 569.33 mi (916.25 km) |
| Barnstaple to Oberursel | 556.31 mi (895.30 km) |
| Barnstaple to Ochsenfurt | 629.40 mi (1,012.93 km) |
| Barnstaple to Ochsenhausen | 659.90 mi (1,062.01 km) |
| Barnstaple to Ochtrup | 488.09 mi (785.50 km) |
| Barnstaple to Odenthal | 484.93 mi (780.43 km) |
| Barnstaple to Oelde | 527.61 mi (849.11 km) |
| Barnstaple to Oelsnitz | 709.42 mi (1,141.70 km) |
| Barnstaple to Oer-Erkenschwick | 489.03 mi (787.01 km) |
