| Castelfranco Veneto to Olympia Heights (Florida) | 5,072.22 mi (8,162.95 km) |
| Castelfranco Veneto to Omaha (Nebraska) | 4,972.57 mi (8,002.58 km) |
| Castelfranco Veneto to On Top of the World Designated Place (Florida) | 4,999.73 mi (8,046.28 km) |
| Castelfranco Veneto to Onalaska (Wisconsin) | 4,669.40 mi (7,514.68 km) |
| Castelfranco Veneto to Oneida (New York) | 4,100.00 mi (6,598.31 km) |
| Castelfranco Veneto to Oneonta (New York) | 4,100.59 mi (6,599.27 km) |
| Castelfranco Veneto to Ontario (California) | 6,092.75 mi (9,805.33 km) |
| Castelfranco Veneto to Ontario (Oregon) | 5,495.83 mi (8,844.69 km) |
| Castelfranco Veneto to Opa-locka (Florida) | 5,060.12 mi (8,143.47 km) |
| Castelfranco Veneto to Opelika (Alabama) | 4,965.80 mi (7,991.68 km) |
| Castelfranco Veneto to Opelousas (Louisiana) | 5,350.34 mi (8,610.54 km) |
| Castelfranco Veneto to Orange (California) | 6,113.11 mi (9,838.10 km) |
| Castelfranco Veneto to Orange (Texas) | 5,439.59 mi (8,754.18 km) |
| Castelfranco Veneto to Orange City (Florida) | 4,963.56 mi (7,988.07 km) |
| Castelfranco Veneto to Orangeburg (South Carolina) | 4,733.98 mi (7,618.61 km) |
