| Mastic to Oberkirch | 3,823.51 mi (6,153.35 km) |
| Mastic to Obernburg am Main | 3,829.44 mi (6,162.88 km) |
| Mastic to Obernkirchen | 3,761.18 mi (6,053.04 km) |
| Mastic to Oberschleissheim | 3,975.97 mi (6,398.71 km) |
| Mastic to Oberstdorf | 3,948.66 mi (6,354.76 km) |
| Mastic to Obertraubling | 3,978.20 mi (6,402.29 km) |
| Mastic to Obertshausen | 3,810.51 mi (6,132.42 km) |
| Mastic to Oberursel | 3,796.30 mi (6,109.55 km) |
| Mastic to Ochsenfurt | 3,872.45 mi (6,232.10 km) |
| Mastic to Ochsenhausen | 3,914.61 mi (6,299.95 km) |
| Mastic to Ochtrup | 3,687.32 mi (5,934.17 km) |
| Mastic to Odenthal | 3,714.87 mi (5,978.51 km) |
| Mastic to Oelde | 3,734.81 mi (6,010.60 km) |
| Mastic to Oelsnitz | 3,933.78 mi (6,330.81 km) |
| Mastic to Oer-Erkenschwick | 3,704.25 mi (5,961.42 km) |
