| Udine to Olympia Heights (Florida) | 5,121.18 mi (8,241.75 km) |
| Udine to Omaha (Nebraska) | 5,001.03 mi (8,048.38 km) |
| Udine to On Top of the World Designated Place (Florida) | 5,045.41 mi (8,119.80 km) |
| Udine to Onalaska (Wisconsin) | 4,698.59 mi (7,561.66 km) |
| Udine to Oneida (New York) | 4,138.21 mi (6,659.81 km) |
| Udine to Oneonta (New York) | 4,139.67 mi (6,662.16 km) |
| Udine to Ontario (California) | 6,110.97 mi (9,834.65 km) |
| Udine to Ontario (Oregon) | 5,508.25 mi (8,864.67 km) |
| Udine to Opa-locka (Florida) | 5,109.01 mi (8,222.16 km) |
| Udine to Opelika (Alabama) | 5,007.24 mi (8,058.37 km) |
| Udine to Opelousas (Louisiana) | 5,389.25 mi (8,673.16 km) |
| Udine to Orange (California) | 6,131.30 mi (9,867.37 km) |
| Udine to Orange (Texas) | 5,477.72 mi (8,815.54 km) |
| Udine to Orange City (Florida) | 5,009.91 mi (8,062.67 km) |
| Udine to Orangeburg (South Carolina) | 4,777.36 mi (7,688.42 km) |
