| Campobello di Mazara to Olympia Heights (Florida) | 5,313.56 mi (8,551.34 km) |
| Campobello di Mazara to Omaha (Nebraska) | 5,377.46 mi (8,654.18 km) |
| Campobello di Mazara to On Top of the World Designated Place (Florida) | 5,274.15 mi (8,487.92 km) |
| Campobello di Mazara to Onalaska (Wisconsin) | 5,071.64 mi (8,162.02 km) |
| Campobello di Mazara to Oneida (New York) | 4,445.33 mi (7,154.07 km) |
| Campobello di Mazara to Oneonta (New York) | 4,439.33 mi (7,144.40 km) |
| Campobello di Mazara to Ontario (California) | 6,547.94 mi (10,537.89 km) |
| Campobello di Mazara to Ontario (Oregon) | 5,979.01 mi (9,622.28 km) |
| Campobello di Mazara to Opa-locka (Florida) | 5,302.25 mi (8,533.14 km) |
| Campobello di Mazara to Opelika (Alabama) | 5,278.19 mi (8,494.42 km) |
| Campobello di Mazara to Opelousas (Louisiana) | 5,680.27 mi (9,141.52 km) |
| Campobello di Mazara to Orange (California) | 6,568.37 mi (10,570.77 km) |
| Campobello di Mazara to Orange (Texas) | 5,775.02 mi (9,294.00 km) |
| Campobello di Mazara to Orange City (Florida) | 5,231.94 mi (8,419.99 km) |
| Campobello di Mazara to Orangeburg (South Carolina) | 5,031.74 mi (8,097.81 km) |
