| West Mifflin to Oberkirch | 4,132.16 mi (6,650.06 km) |
| West Mifflin to Obernburg am Main | 4,131.61 mi (6,649.19 km) |
| West Mifflin to Obernkirchen | 4,053.23 mi (6,523.04 km) |
| West Mifflin to Oberschleissheim | 4,281.12 mi (6,889.79 km) |
| West Mifflin to Oberstdorf | 4,258.66 mi (6,853.66 km) |
| West Mifflin to Obertraubling | 4,279.79 mi (6,887.66 km) |
| West Mifflin to Obertshausen | 4,112.16 mi (6,617.88 km) |
| West Mifflin to Oberursel | 4,097.72 mi (6,594.64 km) |
| West Mifflin to Ochsenfurt | 4,174.18 mi (6,717.70 km) |
| West Mifflin to Ochsenhausen | 4,222.59 mi (6,795.60 km) |
| West Mifflin to Ochtrup | 3,981.97 mi (6,408.35 km) |
| West Mifflin to Odenthal | 4,014.65 mi (6,460.96 km) |
| West Mifflin to Oelde | 4,029.93 mi (6,485.54 km) |
| West Mifflin to Oelsnitz | 4,229.64 mi (6,806.95 km) |
| West Mifflin to Oer-Erkenschwick | 4,001.28 mi (6,439.44 km) |
