| Romilly-sur-Seine to Orangevale (California) | 5,533.73 mi (8,905.68 km) |
| Romilly-sur-Seine to Orchards (Washington) | 5,167.36 mi (8,316.07 km) |
| Romilly-sur-Seine to Orcutt (California) | 5,729.43 mi (9,220.62 km) |
| Romilly-sur-Seine to Oregon (Ohio) | 4,042.33 mi (6,505.50 km) |
| Romilly-sur-Seine to Oregon (Wisconsin) | 4,219.12 mi (6,790.02 km) |
| Romilly-sur-Seine to Oregon City (Oregon) | 5,189.01 mi (8,350.90 km) |
| Romilly-sur-Seine to Orem (Utah) | 5,145.95 mi (8,281.61 km) |
| Romilly-sur-Seine to Orinda (California) | 5,608.85 mi (9,026.57 km) |
| Romilly-sur-Seine to Orland Park (Illinois) | 4,219.64 mi (6,790.86 km) |
| Romilly-sur-Seine to Orlando (Florida) | 4,557.72 mi (7,334.94 km) |
| Romilly-sur-Seine to Ormond Beach (Florida) | 4,508.28 mi (7,255.38 km) |
| Romilly-sur-Seine to Oro Valley (Arizona) | 5,550.35 mi (8,932.43 km) |
| Romilly-sur-Seine to Oroville (California) | 5,497.01 mi (8,846.59 km) |
| Romilly-sur-Seine to Oshkosh (Wisconsin) | 4,138.34 mi (6,660.01 km) |
| Romilly-sur-Seine to Oskaloosa (Iowa) | 4,418.49 mi (7,110.87 km) |
