| Grain Valley to Oberkirch | 4,751.09 mi (7,646.14 km) |
| Grain Valley to Obernburg am Main | 4,737.42 mi (7,624.14 km) |
| Grain Valley to Obernkirchen | 4,639.73 mi (7,466.93 km) |
| Grain Valley to Oberschleissheim | 4,891.12 mi (7,871.49 km) |
| Grain Valley to Oberstdorf | 4,878.91 mi (7,851.84 km) |
| Grain Valley to Obertraubling | 4,882.54 mi (7,857.69 km) |
| Grain Valley to Obertshausen | 4,717.17 mi (7,591.55 km) |
| Grain Valley to Oberursel | 4,702.45 mi (7,567.86 km) |
| Grain Valley to Ochsenfurt | 4,778.56 mi (7,690.35 km) |
| Grain Valley to Ochsenhausen | 4,839.11 mi (7,787.80 km) |
| Grain Valley to Ochtrup | 4,574.70 mi (7,362.26 km) |
| Grain Valley to Odenthal | 4,617.19 mi (7,430.65 km) |
| Grain Valley to Oelde | 4,622.91 mi (7,439.85 km) |
| Grain Valley to Oelsnitz | 4,821.35 mi (7,759.21 km) |
| Grain Valley to Oer-Erkenschwick | 4,598.48 mi (7,400.54 km) |
