| Portishead to Oberkirch | 522.33 mi (840.61 km) |
| Portishead to Obernburg am Main | 532.96 mi (857.71 km) |
| Portishead to Obernkirchen | 509.07 mi (819.27 km) |
| Portishead to Oberschleissheim | 674.81 mi (1,086.00 km) |
| Portishead to Oberstdorf | 648.75 mi (1,044.06 km) |
| Portishead to Obertraubling | 681.15 mi (1,096.21 km) |
| Portishead to Obertshausen | 515.45 mi (829.53 km) |
| Portishead to Oberursel | 502.04 mi (807.95 km) |
| Portishead to Ochsenfurt | 576.30 mi (927.47 km) |
| Portishead to Ochsenhausen | 613.13 mi (986.73 km) |
| Portishead to Ochtrup | 427.41 mi (687.86 km) |
| Portishead to Odenthal | 427.98 mi (688.76 km) |
| Portishead to Oelde | 467.92 mi (753.04 km) |
| Portishead to Oelsnitz | 652.86 mi (1,050.68 km) |
| Portishead to Oer-Erkenschwick | 429.90 mi (691.85 km) |
