| North Royalton to Olympia Heights (Florida) | 1,080.15 mi (1,738.33 km) |
| North Royalton to Omaha (Nebraska) | 741.98 mi (1,194.11 km) |
| North Royalton to On Top of the World Designated Place (Florida) | 844.04 mi (1,358.35 km) |
| North Royalton to Onalaska (Wisconsin) | 512.70 mi (825.11 km) |
| North Royalton to Oneida (New York) | 334.25 mi (537.92 km) |
| North Royalton to Oneonta (New York) | 352.36 mi (567.08 km) |
| North Royalton to Ontario (California) | 2,009.04 mi (3,233.24 km) |
| North Royalton to Ontario (Oregon) | 1,785.89 mi (2,874.11 km) |
| North Royalton to Opa-locka (Florida) | 1,068.41 mi (1,719.44 km) |
| North Royalton to Opelika (Alabama) | 630.38 mi (1,014.49 km) |
| North Royalton to Opelousas (Louisiana) | 941.97 mi (1,515.96 km) |
| North Royalton to Orange (California) | 2,027.16 mi (3,262.40 km) |
| North Royalton to Orange (Texas) | 1,023.70 mi (1,647.49 km) |
| North Royalton to Orange City (Florida) | 855.69 mi (1,377.10 km) |
| North Royalton to Orangeburg (South Carolina) | 542.51 mi (873.09 km) |
