| Castelnuovo di Verona to Olympia Heights (Florida) | 5,024.53 mi (8,086.20 km) |
| Castelnuovo di Verona to Omaha (Nebraska) | 4,940.51 mi (7,950.98 km) |
| Castelnuovo di Verona to On Top of the World Designated Place (Florida) | 4,954.43 mi (7,973.39 km) |
| Castelnuovo di Verona to Onalaska (Wisconsin) | 4,636.81 mi (7,462.23 km) |
| Castelnuovo di Verona to Oneida (New York) | 4,060.48 mi (6,534.70 km) |
| Castelnuovo di Verona to Oneonta (New York) | 4,060.40 mi (6,534.59 km) |
| Castelnuovo di Verona to Ontario (California) | 6,068.68 mi (9,766.60 km) |
| Castelnuovo di Verona to Ontario (Oregon) | 5,476.65 mi (8,813.81 km) |
| Castelnuovo di Verona to Opa-locka (Florida) | 5,012.48 mi (8,066.80 km) |
| Castelnuovo di Verona to Opelika (Alabama) | 4,923.67 mi (7,923.89 km) |
| Castelnuovo di Verona to Opelousas (Louisiana) | 5,310.07 mi (8,545.74 km) |
| Castelnuovo di Verona to Orange (California) | 6,089.06 mi (9,799.40 km) |
| Castelnuovo di Verona to Orange (Texas) | 5,399.92 mi (8,690.33 km) |
| Castelnuovo di Verona to Orange City (Florida) | 4,917.77 mi (7,914.39 km) |
| Castelnuovo di Verona to Orangeburg (South Carolina) | 4,690.43 mi (7,548.52 km) |
