| Romilly-sur-Seine to Oswego (Illinois) | 4,234.75 mi (6,815.18 km) |
| Romilly-sur-Seine to Oswego (New York) | 3,686.55 mi (5,932.93 km) |
| Romilly-sur-Seine to Otsego (Minnesota) | 4,269.94 mi (6,871.80 km) |
| Romilly-sur-Seine to Ottawa (Illinois) | 4,268.71 mi (6,869.82 km) |
| Romilly-sur-Seine to Ottawa (Kansas) | 4,647.56 mi (7,479.53 km) |
| Romilly-sur-Seine to Ottumwa (Iowa) | 4,422.86 mi (7,117.90 km) |
| Romilly-sur-Seine to Overland (Missouri) | 4,452.47 mi (7,165.55 km) |
| Romilly-sur-Seine to Overland Park (Kansas) | 4,611.50 mi (7,421.49 km) |
| Romilly-sur-Seine to Overlea (Maryland) | 3,856.19 mi (6,205.94 km) |
| Romilly-sur-Seine to Oviedo (Florida) | 4,542.52 mi (7,310.48 km) |
| Romilly-sur-Seine to Owasso (Oklahoma) | 4,782.92 mi (7,697.36 km) |
| Romilly-sur-Seine to Owatonna (Minnesota) | 4,309.98 mi (6,936.25 km) |
| Romilly-sur-Seine to Owensboro (Kentucky) | 4,366.16 mi (7,026.65 km) |
| Romilly-sur-Seine to Owings Mills (Maryland) | 3,865.72 mi (6,221.27 km) |
| Romilly-sur-Seine to Owosso (Michigan) | 4,013.57 mi (6,459.22 km) |
