| La Spezia to Olympia Heights (Florida) | 5,010.97 mi (8,064.37 km) |
| La Spezia to Omaha (Nebraska) | 4,964.99 mi (7,990.38 km) |
| La Spezia to On Top of the World Designated Place (Florida) | 4,947.78 mi (7,962.69 km) |
| La Spezia to Onalaska (Wisconsin) | 4,660.40 mi (7,500.18 km) |
| La Spezia to Oneida (New York) | 4,069.09 mi (6,548.57 km) |
| La Spezia to Oneonta (New York) | 4,067.42 mi (6,545.89 km) |
| La Spezia to Ontario (California) | 6,107.86 mi (9,829.65 km) |
| La Spezia to Ontario (Oregon) | 5,524.47 mi (8,890.77 km) |
| La Spezia to Opa-locka (Florida) | 4,999.06 mi (8,045.21 km) |
| La Spezia to Opelika (Alabama) | 4,925.42 mi (7,926.69 km) |
| La Spezia to Opelousas (Louisiana) | 5,316.22 mi (8,555.63 km) |
| La Spezia to Orange (California) | 6,128.27 mi (9,862.50 km) |
| La Spezia to Orange (Texas) | 5,407.42 mi (8,702.41 km) |
| La Spezia to Orange City (Florida) | 4,909.78 mi (7,901.53 km) |
| La Spezia to Orangeburg (South Carolina) | 4,688.63 mi (7,545.63 km) |
