| Arenys de Mar to Oberkirch | 550.66 mi (886.20 km) |
| Arenys de Mar to Obernburg am Main | 652.61 mi (1,050.27 km) |
| Arenys de Mar to Obernkirchen | 799.83 mi (1,287.21 km) |
| Arenys de Mar to Oberschleissheim | 637.03 mi (1,025.20 km) |
| Arenys de Mar to Oberstdorf | 553.75 mi (891.17 km) |
| Arenys de Mar to Obertraubling | 690.96 mi (1,111.99 km) |
| Arenys de Mar to Obertshausen | 659.13 mi (1,060.76 km) |
| Arenys de Mar to Oberursel | 661.91 mi (1,065.24 km) |
| Arenys de Mar to Ochsenfurt | 664.61 mi (1,069.59 km) |
| Arenys de Mar to Ochsenhausen | 576.08 mi (927.11 km) |
| Arenys de Mar to Ochtrup | 765.62 mi (1,232.14 km) |
| Arenys de Mar to Odenthal | 688.09 mi (1,107.38 km) |
| Arenys de Mar to Oelde | 755.80 mi (1,216.34 km) |
| Arenys de Mar to Oelsnitz | 763.95 mi (1,229.45 km) |
| Arenys de Mar to Oer-Erkenschwick | 729.63 mi (1,174.23 km) |
