| Rennes to Obernburg am Main | 504.50 mi (811.91 km) |
| Rennes to Obernkirchen | 556.31 mi (895.30 km) |
| Rennes to Oberschleissheim | 609.55 mi (980.97 km) |
| Rennes to Oberstdorf | 556.98 mi (896.38 km) |
| Rennes to Obertraubling | 635.25 mi (1,022.33 km) |
| Rennes to Obertshausen | 493.94 mi (794.92 km) |
| Rennes to Oberursel | 484.91 mi (780.39 km) |
| Rennes to Ochsenfurt | 543.54 mi (874.74 km) |
| Rennes to Ochsenhausen | 536.09 mi (862.75 km) |
| Rennes to Ochtrup | 483.23 mi (777.68 km) |
| Rennes to Odenthal | 442.31 mi (711.82 km) |
| Rennes to Oelde | 506.13 mi (814.53 km) |
| Rennes to Oelsnitz | 643.17 mi (1,035.08 km) |
| Rennes to Oer-Erkenschwick | 465.89 mi (749.77 km) |
| Rennes to Oerlinghausen | 529.96 mi (852.89 km) |
