| Campogalliano to Olympia Heights (Florida) | 5,045.68 mi (8,120.24 km) |
| Campogalliano to Omaha (Nebraska) | 4,977.42 mi (8,010.39 km) |
| Campogalliano to On Top of the World Designated Place (Florida) | 4,978.72 mi (8,012.47 km) |
| Campogalliano to Onalaska (Wisconsin) | 4,673.37 mi (7,521.07 km) |
| Campogalliano to Oneida (New York) | 4,091.18 mi (6,584.12 km) |
| Campogalliano to Oneonta (New York) | 4,090.45 mi (6,582.95 km) |
| Campogalliano to Ontario (California) | 6,110.72 mi (9,834.25 km) |
| Campogalliano to Ontario (Oregon) | 5,521.29 mi (8,885.66 km) |
| Campogalliano to Opa-locka (Florida) | 5,033.69 mi (8,100.95 km) |
| Campogalliano to Opelika (Alabama) | 4,951.61 mi (7,968.84 km) |
| Campogalliano to Opelousas (Louisiana) | 5,339.89 mi (8,593.71 km) |
| Campogalliano to Orange (California) | 6,131.11 mi (9,867.07 km) |
| Campogalliano to Orange (Texas) | 5,430.30 mi (8,739.22 km) |
| Campogalliano to Orange City (Florida) | 4,941.46 mi (7,952.50 km) |
| Campogalliano to Orangeburg (South Carolina) | 4,716.83 mi (7,591.00 km) |
