| Erie to Oberkirch | 4,061.23 mi (6,535.93 km) |
| Erie to Obernburg am Main | 4,057.75 mi (6,530.32 km) |
| Erie to Obernkirchen | 3,975.23 mi (6,397.51 km) |
| Erie to Oberschleissheim | 4,208.39 mi (6,772.75 km) |
| Erie to Oberstdorf | 4,188.22 mi (6,740.29 km) |
| Erie to Obertraubling | 4,205.49 mi (6,768.08 km) |
| Erie to Obertshausen | 4,038.10 mi (6,498.69 km) |
| Erie to Oberursel | 4,023.57 mi (6,475.31 km) |
| Erie to Ochsenfurt | 4,100.07 mi (6,598.43 km) |
| Erie to Ochsenhausen | 4,151.24 mi (6,680.78 km) |
| Erie to Ochtrup | 3,905.11 mi (6,284.67 km) |
| Erie to Odenthal | 3,939.91 mi (6,340.67 km) |
| Erie to Oelde | 3,953.20 mi (6,362.06 km) |
| Erie to Oelsnitz | 4,152.96 mi (6,683.54 km) |
| Erie to Oer-Erkenschwick | 3,925.39 mi (6,317.30 km) |
