| Romilly-sur-Seine to Oestrich-Winkel | 218.24 mi (351.23 km) |
| Romilly-sur-Seine to Offenburg | 192.63 mi (310.00 km) |
| Romilly-sur-Seine to Oftersheim | 228.19 mi (367.23 km) |
| Romilly-sur-Seine to Ohrdruf | 351.46 mi (565.62 km) |
| Romilly-sur-Seine to Ohringen | 266.60 mi (429.05 km) |
| Romilly-sur-Seine to Olbernhau | 454.81 mi (731.95 km) |
| Romilly-sur-Seine to Olching | 349.00 mi (561.66 km) |
| Romilly-sur-Seine to Oldenburg | 374.80 mi (603.18 km) |
| Romilly-sur-Seine to Oldenburg in Holstein | 504.30 mi (811.59 km) |
| Romilly-sur-Seine to Olfen | 274.07 mi (441.08 km) |
| Romilly-sur-Seine to Olpe | 251.81 mi (405.25 km) |
| Romilly-sur-Seine to Olsberg | 288.16 mi (463.75 km) |
| Romilly-sur-Seine to Oranienburg | 508.71 mi (818.69 km) |
| Romilly-sur-Seine to Ortenberg | 270.99 mi (436.12 km) |
| Romilly-sur-Seine to Oschatz | 459.17 mi (738.96 km) |
