| Parma Heights to Oberkirch | 4,160.47 mi (6,695.64 km) |
| Parma Heights to Obernburg am Main | 4,156.44 mi (6,689.14 km) |
| Parma Heights to Obernkirchen | 4,072.96 mi (6,554.80 km) |
| Parma Heights to Oberschleissheim | 4,307.29 mi (6,931.91 km) |
| Parma Heights to Oberstdorf | 4,287.53 mi (6,900.12 km) |
| Parma Heights to Obertraubling | 4,304.07 mi (6,926.72 km) |
| Parma Heights to Obertshausen | 4,136.75 mi (6,657.45 km) |
| Parma Heights to Oberursel | 4,122.20 mi (6,634.05 km) |
| Parma Heights to Ochsenfurt | 4,198.70 mi (6,757.16 km) |
| Parma Heights to Ochsenhausen | 4,250.40 mi (6,840.36 km) |
| Parma Heights to Ochtrup | 4,003.15 mi (6,442.44 km) |
| Parma Heights to Odenthal | 4,038.43 mi (6,499.22 km) |
| Parma Heights to Oelde | 4,051.26 mi (6,519.87 km) |
| Parma Heights to Oelsnitz | 4,251.00 mi (6,841.33 km) |
| Parma Heights to Oer-Erkenschwick | 4,023.64 mi (6,475.43 km) |
