| Cervignano del Friuli to Olympia Heights (Florida) | 5,131.74 mi (8,258.74 km) |
| Cervignano del Friuli to Omaha (Nebraska) | 5,015.92 mi (8,072.34 km) |
| Cervignano del Friuli to On Top of the World Designated Place (Florida) | 5,056.87 mi (8,138.25 km) |
| Cervignano del Friuli to Onalaska (Wisconsin) | 4,713.36 mi (7,585.42 km) |
| Cervignano del Friuli to Oneida (New York) | 4,151.38 mi (6,680.99 km) |
| Cervignano del Friuli to Oneonta (New York) | 4,152.66 mi (6,683.06 km) |
| Cervignano del Friuli to Ontario (California) | 6,127.15 mi (9,860.69 km) |
| Cervignano del Friuli to Ontario (Oregon) | 5,524.94 mi (8,891.54 km) |
| Cervignano del Friuli to Opa-locka (Florida) | 5,119.59 mi (8,239.19 km) |
| Cervignano del Friuli to Opelika (Alabama) | 5,019.73 mi (8,078.47 km) |
| Cervignano del Friuli to Opelousas (Louisiana) | 5,402.29 mi (8,694.15 km) |
| Cervignano del Friuli to Orange (California) | 6,147.48 mi (9,893.41 km) |
| Cervignano del Friuli to Orange (Texas) | 5,490.93 mi (8,836.79 km) |
| Cervignano del Friuli to Orange City (Florida) | 5,021.20 mi (8,080.83 km) |
| Cervignano del Friuli to Orangeburg (South Carolina) | 4,789.39 mi (7,707.78 km) |
