| Parma to Olympia Heights (Florida) | 5,018.81 mi (8,076.99 km) |
| Parma to Omaha (Nebraska) | 4,952.68 mi (7,970.57 km) |
| Parma to On Top of the World Designated Place (Florida) | 4,951.96 mi (7,969.41 km) |
| Parma to Onalaska (Wisconsin) | 4,648.53 mi (7,481.09 km) |
| Parma to Oneida (New York) | 4,065.10 mi (6,542.15 km) |
| Parma to Oneonta (New York) | 4,064.28 mi (6,540.82 km) |
| Parma to Ontario (California) | 6,087.83 mi (9,797.42 km) |
| Parma to Ontario (Oregon) | 5,499.80 mi (8,851.07 km) |
| Parma to Opa-locka (Florida) | 5,006.82 mi (8,057.70 km) |
| Parma to Opelika (Alabama) | 4,925.15 mi (7,926.27 km) |
| Parma to Opelousas (Louisiana) | 5,313.66 mi (8,551.51 km) |
| Parma to Orange (California) | 6,108.23 mi (9,830.24 km) |
| Parma to Orange (Texas) | 5,404.15 mi (8,697.14 km) |
| Parma to Orange City (Florida) | 4,914.67 mi (7,909.39 km) |
| Parma to Orangeburg (South Carolina) | 4,690.22 mi (7,548.18 km) |
