| Olesa de Montserrat to Oberkirch | 569.16 mi (915.97 km) |
| Olesa de Montserrat to Obernburg am Main | 670.70 mi (1,079.38 km) |
| Olesa de Montserrat to Obernkirchen | 814.51 mi (1,310.83 km) |
| Olesa de Montserrat to Oberschleissheim | 661.39 mi (1,064.41 km) |
| Olesa de Montserrat to Oberstdorf | 578.22 mi (930.56 km) |
| Olesa de Montserrat to Obertraubling | 714.68 mi (1,150.17 km) |
| Olesa de Montserrat to Obertshausen | 676.34 mi (1,088.47 km) |
| Olesa de Montserrat to Oberursel | 678.48 mi (1,091.91 km) |
| Olesa de Montserrat to Ochsenfurt | 684.46 mi (1,101.53 km) |
| Olesa de Montserrat to Ochsenhausen | 598.71 mi (963.52 km) |
| Olesa de Montserrat to Ochtrup | 777.36 mi (1,251.04 km) |
| Olesa de Montserrat to Odenthal | 700.94 mi (1,128.06 km) |
| Olesa de Montserrat to Oelde | 769.50 mi (1,238.39 km) |
| Olesa de Montserrat to Oelsnitz | 785.24 mi (1,263.72 km) |
| Olesa de Montserrat to Oer-Erkenschwick | 742.05 mi (1,194.21 km) |
