| Tarquinia to Olympia Heights (Florida) | 5,146.58 mi (8,282.62 km) |
| Tarquinia to Omaha (Nebraska) | 5,122.74 mi (8,244.26 km) |
| Tarquinia to On Top of the World Designated Place (Florida) | 5,088.93 mi (8,189.84 km) |
| Tarquinia to Onalaska (Wisconsin) | 4,817.90 mi (7,753.66 km) |
| Tarquinia to Oneida (New York) | 4,220.34 mi (6,791.99 km) |
| Tarquinia to Oneonta (New York) | 4,217.81 mi (6,787.92 km) |
| Tarquinia to Ontario (California) | 6,268.55 mi (10,088.26 km) |
| Tarquinia to Ontario (Oregon) | 5,685.27 mi (9,149.56 km) |
| Tarquinia to Opa-locka (Florida) | 5,134.81 mi (8,263.68 km) |
| Tarquinia to Opelika (Alabama) | 5,072.36 mi (8,163.17 km) |
| Tarquinia to Opelousas (Louisiana) | 5,465.68 mi (8,796.16 km) |
| Tarquinia to Orange (California) | 6,288.96 mi (10,121.11 km) |
| Tarquinia to Orange (Texas) | 5,557.63 mi (8,944.14 km) |
| Tarquinia to Orange City (Florida) | 5,049.94 mi (8,127.09 km) |
| Tarquinia to Orangeburg (South Carolina) | 4,833.35 mi (7,778.53 km) |
