| West Allis to Oberkirch | 4,328.14 mi (6,965.47 km) |
| West Allis to Obernburg am Main | 4,315.38 mi (6,944.94 km) |
| West Allis to Obernkirchen | 4,219.47 mi (6,790.58 km) |
| West Allis to Oberschleissheim | 4,468.84 mi (7,191.91 km) |
| West Allis to Oberstdorf | 4,455.94 mi (7,171.14 km) |
| West Allis to Obertraubling | 4,460.86 mi (7,179.05 km) |
| West Allis to Obertshausen | 4,295.18 mi (6,912.43 km) |
| West Allis to Oberursel | 4,280.48 mi (6,888.76 km) |
| West Allis to Ochsenfurt | 4,356.67 mi (7,011.38 km) |
| West Allis to Ochsenhausen | 4,416.35 mi (7,107.43 km) |
| West Allis to Ochtrup | 4,153.72 mi (6,684.77 km) |
| West Allis to Odenthal | 4,195.34 mi (6,751.75 km) |
| West Allis to Oelde | 4,201.95 mi (6,762.38 km) |
| West Allis to Oelsnitz | 4,400.69 mi (7,082.23 km) |
| West Allis to Oer-Erkenschwick | 4,177.10 mi (6,722.39 km) |
