| Thouare-sur-Loire to Olympia Heights (Florida) | 4,430.19 mi (7,129.69 km) |
| Thouare-sur-Loire to Omaha (Nebraska) | 4,399.76 mi (7,080.74 km) |
| Thouare-sur-Loire to On Top of the World Designated Place (Florida) | 4,363.51 mi (7,022.39 km) |
| Thouare-sur-Loire to Onalaska (Wisconsin) | 4,094.22 mi (6,589.01 km) |
| Thouare-sur-Loire to Oneida (New York) | 3,487.38 mi (5,612.39 km) |
| Thouare-sur-Loire to Oneonta (New York) | 3,484.77 mi (5,608.20 km) |
| Thouare-sur-Loire to Ontario (California) | 5,569.44 mi (8,963.14 km) |
| Thouare-sur-Loire to Ontario (Oregon) | 5,011.53 mi (8,065.27 km) |
| Thouare-sur-Loire to Opa-locka (Florida) | 4,418.17 mi (7,110.36 km) |
| Thouare-sur-Loire to Opelika (Alabama) | 4,340.68 mi (6,985.64 km) |
| Thouare-sur-Loire to Opelousas (Louisiana) | 4,732.79 mi (7,616.68 km) |
| Thouare-sur-Loire to Orange (California) | 5,589.86 mi (8,996.01 km) |
| Thouare-sur-Loire to Orange (Texas) | 4,824.60 mi (7,764.45 km) |
| Thouare-sur-Loire to Orange City (Florida) | 4,325.96 mi (6,961.96 km) |
| Thouare-sur-Loire to Orangeburg (South Carolina) | 4,103.59 mi (6,604.08 km) |
