| North Royalton to Oerlinghausen | 4,068.97 mi (6,548.37 km) |
| North Royalton to Oestrich-Winkel | 4,109.49 mi (6,613.59 km) |
| North Royalton to Offenburg | 4,159.35 mi (6,693.82 km) |
| North Royalton to Oftersheim | 4,153.72 mi (6,684.76 km) |
| North Royalton to Ohrdruf | 4,185.26 mi (6,735.53 km) |
| North Royalton to Ohringen | 4,195.29 mi (6,751.66 km) |
| North Royalton to Olbernhau | 4,288.17 mi (6,901.15 km) |
| North Royalton to Olching | 4,301.97 mi (6,923.35 km) |
| North Royalton to Oldenburg | 4,013.73 mi (6,459.48 km) |
| North Royalton to Oldenburg in Holstein | 4,071.95 mi (6,553.17 km) |
| North Royalton to Olfen | 4,028.96 mi (6,483.99 km) |
| North Royalton to Olpe | 4,069.02 mi (6,548.46 km) |
| North Royalton to Olsberg | 4,082.60 mi (6,570.31 km) |
| North Royalton to Oranienburg | 4,209.03 mi (6,773.78 km) |
| North Royalton to Ortenberg | 4,138.00 mi (6,659.47 km) |
