| Romilly-sur-Seine to Olivenza | 867.00 mi (1,395.30 km) |
| Romilly-sur-Seine to Olot | 441.70 mi (710.85 km) |
| Romilly-sur-Seine to Onate | 480.44 mi (773.19 km) |
| Romilly-sur-Seine to Onda | 622.89 mi (1,002.44 km) |
| Romilly-sur-Seine to Onteniente | 703.61 mi (1,132.35 km) |
| Romilly-sur-Seine to Orihuela | 757.63 mi (1,219.28 km) |
| Romilly-sur-Seine to Osuna | 897.18 mi (1,443.88 km) |
| Romilly-sur-Seine to Ourense | 704.52 mi (1,133.82 km) |
| Romilly-sur-Seine to Oviedo | 581.01 mi (935.05 km) |
| Romilly-sur-Seine to Paiporta | 660.62 mi (1,063.16 km) |
| Romilly-sur-Seine to Pajara | 1,685.63 mi (2,712.77 km) |
| Romilly-sur-Seine to Palafolls | 475.43 mi (765.14 km) |
| Romilly-sur-Seine to Palafrugell | 456.73 mi (735.03 km) |
| Romilly-sur-Seine to Palamos | 461.77 mi (743.14 km) |
| Romilly-sur-Seine to Palencia | 601.78 mi (968.47 km) |
