| Millau to Olympia Heights (Florida) | 4,691.48 mi (7,550.21 km) |
| Millau to Omaha (Nebraska) | 4,703.99 mi (7,570.34 km) |
| Millau to On Top of the World Designated Place (Florida) | 4,635.81 mi (7,460.62 km) |
| Millau to Onalaska (Wisconsin) | 4,398.23 mi (7,078.26 km) |
| Millau to Oneida (New York) | 3,780.15 mi (6,083.56 km) |
| Millau to Oneonta (New York) | 3,775.86 mi (6,076.65 km) |
| Millau to Ontario (California) | 5,878.11 mi (9,459.91 km) |
| Millau to Ontario (Oregon) | 5,319.86 mi (8,561.49 km) |
| Millau to Opa-locka (Florida) | 4,679.73 mi (7,531.30 km) |
| Millau to Opelika (Alabama) | 4,624.43 mi (7,442.29 km) |
| Millau to Opelousas (Louisiana) | 5,021.23 mi (8,080.89 km) |
| Millau to Orange (California) | 5,898.54 mi (9,492.78 km) |
| Millau to Orange (Texas) | 5,114.42 mi (8,230.87 km) |
| Millau to Orange City (Florida) | 4,596.29 mi (7,397.02 km) |
| Millau to Orangeburg (South Carolina) | 4,383.05 mi (7,053.83 km) |
