| Elk River to Oberkirch | 4,419.58 mi (7,112.63 km) |
| Elk River to Obernburg am Main | 4,398.11 mi (7,078.07 km) |
| Elk River to Obernkirchen | 4,290.48 mi (6,904.86 km) |
| Elk River to Oberschleissheim | 4,553.07 mi (7,327.46 km) |
| Elk River to Oberstdorf | 4,547.20 mi (7,318.01 km) |
| Elk River to Obertraubling | 4,540.33 mi (7,306.96 km) |
| Elk River to Obertshausen | 4,377.55 mi (7,044.99 km) |
| Elk River to Oberursel | 4,362.79 mi (7,021.23 km) |
| Elk River to Ochsenfurt | 4,438.09 mi (7,142.41 km) |
| Elk River to Ochsenhausen | 4,505.40 mi (7,250.75 km) |
| Elk River to Ochtrup | 4,229.31 mi (6,806.42 km) |
| Elk River to Odenthal | 4,276.95 mi (6,883.09 km) |
| Elk River to Oelde | 4,277.27 mi (6,883.61 km) |
| Elk River to Oelsnitz | 4,473.48 mi (7,199.38 km) |
| Elk River to Oer-Erkenschwick | 4,255.38 mi (6,848.37 km) |
