| San Vito al Tagliamento to Olympia Heights (Florida) | 5,108.79 mi (8,221.81 km) |
| San Vito al Tagliamento to Omaha (Nebraska) | 4,995.59 mi (8,039.62 km) |
| San Vito al Tagliamento to On Top of the World Designated Place (Florida) | 5,034.17 mi (8,101.72 km) |
| San Vito al Tagliamento to Onalaska (Wisconsin) | 4,692.90 mi (7,552.50 km) |
| San Vito al Tagliamento to Oneida (New York) | 4,129.51 mi (6,645.80 km) |
| San Vito al Tagliamento to Oneonta (New York) | 4,130.68 mi (6,647.68 km) |
| San Vito al Tagliamento to Ontario (California) | 6,108.85 mi (9,831.25 km) |
| San Vito al Tagliamento to Ontario (Oregon) | 5,507.94 mi (8,864.18 km) |
| San Vito al Tagliamento to Opa-locka (Florida) | 5,096.64 mi (8,202.26 km) |
| San Vito al Tagliamento to Opelika (Alabama) | 4,997.46 mi (8,042.64 km) |
| San Vito al Tagliamento to Opelousas (Louisiana) | 5,380.34 mi (8,658.83 km) |
| San Vito al Tagliamento to Orange (California) | 6,129.19 mi (9,863.99 km) |
| San Vito al Tagliamento to Orange (Texas) | 5,469.08 mi (8,801.64 km) |
| San Vito al Tagliamento to Orange City (Florida) | 4,998.44 mi (8,044.20 km) |
| San Vito al Tagliamento to Orangeburg (South Carolina) | 4,766.91 mi (7,671.61 km) |
