| Olivenza to Olympia Heights (Florida) | 4,262.99 mi (6,860.63 km) |
| Olivenza to Omaha (Nebraska) | 4,489.58 mi (7,225.28 km) |
| Olivenza to On Top of the World Designated Place (Florida) | 4,243.55 mi (6,829.34 km) |
| Olivenza to Onalaska (Wisconsin) | 4,186.25 mi (6,737.12 km) |
| Olivenza to Oneida (New York) | 3,493.23 mi (5,621.81 km) |
| Olivenza to Oneonta (New York) | 3,479.45 mi (5,599.64 km) |
| Olivenza to Ontario (California) | 5,729.07 mi (9,220.04 km) |
| Olivenza to Ontario (Oregon) | 5,244.30 mi (8,439.89 km) |
| Olivenza to Opa-locka (Florida) | 4,252.16 mi (6,843.20 km) |
| Olivenza to Opelika (Alabama) | 4,277.59 mi (6,884.12 km) |
| Olivenza to Opelousas (Louisiana) | 4,691.11 mi (7,549.61 km) |
| Olivenza to Orange (California) | 5,749.17 mi (9,252.40 km) |
| Olivenza to Orange (Texas) | 4,790.09 mi (7,708.91 km) |
| Olivenza to Orange City (Florida) | 4,197.69 mi (6,755.54 km) |
| Olivenza to Orangeburg (South Carolina) | 4,021.46 mi (6,471.92 km) |
