| Parma Heights to Oerlinghausen | 4,066.18 mi (6,543.88 km) |
| Parma Heights to Oestrich-Winkel | 4,106.87 mi (6,609.37 km) |
| Parma Heights to Offenburg | 4,156.85 mi (6,689.80 km) |
| Parma Heights to Oftersheim | 4,151.13 mi (6,680.60 km) |
| Parma Heights to Ohrdruf | 4,182.50 mi (6,731.09 km) |
| Parma Heights to Ohringen | 4,192.68 mi (6,747.47 km) |
| Parma Heights to Olbernhau | 4,285.36 mi (6,896.61 km) |
| Parma Heights to Olching | 4,299.39 mi (6,919.20 km) |
| Parma Heights to Oldenburg | 4,010.86 mi (6,454.86 km) |
| Parma Heights to Oldenburg in Holstein | 4,068.93 mi (6,548.31 km) |
| Parma Heights to Olfen | 4,026.23 mi (6,479.59 km) |
| Parma Heights to Olpe | 4,066.33 mi (6,544.13 km) |
| Parma Heights to Olsberg | 4,079.86 mi (6,565.91 km) |
| Parma Heights to Oranienburg | 4,206.06 mi (6,769.01 km) |
| Parma Heights to Ortenberg | 4,135.32 mi (6,655.16 km) |
