| Viadana to Olympia Heights (Florida) | 5,024.82 mi (8,086.66 km) |
| Viadana to Omaha (Nebraska) | 4,954.19 mi (7,973.00 km) |
| Viadana to On Top of the World Designated Place (Florida) | 4,957.20 mi (7,977.84 km) |
| Viadana to Onalaska (Wisconsin) | 4,650.16 mi (7,483.71 km) |
| Viadana to Oneida (New York) | 4,068.57 mi (6,547.73 km) |
| Viadana to Oneonta (New York) | 4,067.93 mi (6,546.71 km) |
| Viadana to Ontario (California) | 6,087.42 mi (9,796.76 km) |
| Viadana to Ontario (Oregon) | 5,498.22 mi (8,848.52 km) |
| Viadana to Opa-locka (Florida) | 5,012.81 mi (8,067.34 km) |
| Viadana to Opelika (Alabama) | 4,929.42 mi (7,933.14 km) |
| Viadana to Opelousas (Louisiana) | 5,317.41 mi (8,557.55 km) |
| Viadana to Orange (California) | 6,107.81 mi (9,829.57 km) |
| Viadana to Orange (Texas) | 5,407.74 mi (8,702.92 km) |
| Viadana to Orange City (Florida) | 4,920.05 mi (7,918.06 km) |
| Viadana to Orangeburg (South Carolina) | 4,694.91 mi (7,555.72 km) |
