| Romilly-sur-Seine to Castle Rock (Colorado) | 4,961.84 mi (7,985.32 km) |
| Romilly-sur-Seine to Castro Valley (California) | 5,615.37 mi (9,037.07 km) |
| Romilly-sur-Seine to Catalina Foothills (Arizona) | 5,553.40 mi (8,937.34 km) |
| Romilly-sur-Seine to Cataño (Puerto Rico) | 4,356.43 mi (7,010.99 km) |
| Romilly-sur-Seine to Cathedral City (California) | 5,660.59 mi (9,109.84 km) |
| Romilly-sur-Seine to Catonsville (Maryland) | 3,869.90 mi (6,228.01 km) |
| Romilly-sur-Seine to Cave Spring (Virginia) | 4,096.22 mi (6,592.23 km) |
| Romilly-sur-Seine to Cayce (South Carolina) | 4,288.50 mi (6,901.67 km) |
| Romilly-sur-Seine to Cayey (Puerto Rico) | 4,373.27 mi (7,038.11 km) |
| Romilly-sur-Seine to Cedar City (Utah) | 5,334.61 mi (8,585.23 km) |
| Romilly-sur-Seine to Cedar Falls (Iowa) | 4,354.00 mi (7,007.09 km) |
| Romilly-sur-Seine to Cedar Hill (Texas) | 5,012.58 mi (8,066.97 km) |
| Romilly-sur-Seine to Cedar Lake (Indiana) | 4,213.81 mi (6,781.48 km) |
| Romilly-sur-Seine to Cedar Mill (Oregon) | 5,183.41 mi (8,341.90 km) |
| Romilly-sur-Seine to Cedar Park (Texas) | 5,152.11 mi (8,291.52 km) |
