| Kleve to Olympia Heights (Florida) | 4,695.52 mi (7,556.71 km) |
| Kleve to Omaha (Nebraska) | 4,502.45 mi (7,245.99 km) |
| Kleve to On Top of the World Designated Place (Florida) | 4,602.05 mi (7,406.29 km) |
| Kleve to Onalaska (Wisconsin) | 4,201.53 mi (6,761.71 km) |
| Kleve to Oneida (New York) | 3,665.62 mi (5,899.24 km) |
| Kleve to Oneonta (New York) | 3,670.16 mi (5,906.56 km) |
| Kleve to Ontario (California) | 5,601.92 mi (9,015.42 km) |
| Kleve to Ontario (Oregon) | 4,999.32 mi (8,045.64 km) |
| Kleve to Opa-locka (Florida) | 4,683.00 mi (7,536.56 km) |
| Kleve to Opelika (Alabama) | 4,544.87 mi (7,314.27 km) |
| Kleve to Opelousas (Louisiana) | 4,916.78 mi (7,912.80 km) |
| Kleve to Orange (California) | 5,622.24 mi (9,048.13 km) |
| Kleve to Orange (Texas) | 5,002.48 mi (8,050.72 km) |
| Kleve to Orange City (Florida) | 4,570.07 mi (7,354.82 km) |
| Kleve to Orangeburg (South Carolina) | 4,323.75 mi (6,958.40 km) |
