| Rockwall to Oberkirch | 5,145.01 mi (8,280.09 km) |
| Rockwall to Obernburg am Main | 5,136.47 mi (8,266.34 km) |
| Rockwall to Obernkirchen | 5,045.33 mi (8,119.67 km) |
| Rockwall to Oberschleissheim | 5,288.87 mi (8,511.61 km) |
| Rockwall to Oberstdorf | 5,272.52 mi (8,485.31 km) |
| Rockwall to Obertraubling | 5,283.01 mi (8,502.18 km) |
| Rockwall to Obertshausen | 5,116.47 mi (8,234.17 km) |
| Rockwall to Oberursel | 5,101.82 mi (8,210.59 km) |
| Rockwall to Ochsenfurt | 5,178.22 mi (8,333.54 km) |
| Rockwall to Ochsenhausen | 5,234.18 mi (8,423.60 km) |
| Rockwall to Ochtrup | 4,978.07 mi (8,011.44 km) |
| Rockwall to Odenthal | 5,017.20 mi (8,074.40 km) |
| Rockwall to Oelde | 5,026.30 mi (8,089.06 km) |
| Rockwall to Oelsnitz | 5,225.59 mi (8,409.78 km) |
| Rockwall to Oer-Erkenschwick | 5,000.36 mi (8,047.31 km) |
