| Risca to Opole | 910.62 mi (1,465.50 km) |
| Risca to Orzesze | 953.87 mi (1,535.10 km) |
| Risca to Osowa | 913.26 mi (1,469.75 km) |
| Risca to Ostroda | 972.76 mi (1,565.51 km) |
| Risca to Ostroleka | 1,040.63 mi (1,674.73 km) |
| Risca to Ostrow Mazowiecka | 1,056.05 mi (1,699.55 km) |
| Risca to Ostrow Wielkopolski | 893.65 mi (1,438.20 km) |
| Risca to Ostrowiec Swietokrzyski | 1,054.75 mi (1,697.46 km) |
| Risca to Ostrzeszow | 901.02 mi (1,450.05 km) |
| Risca to Oswiecim | 976.04 mi (1,570.79 km) |
| Risca to Otwock | 1,035.02 mi (1,665.71 km) |
| Risca to Ozarow Mazowiecki | 1,014.52 mi (1,632.71 km) |
| Risca to Ozimek | 922.50 mi (1,484.62 km) |
| Risca to Ozorkow | 952.82 mi (1,533.41 km) |
| Risca to Pabianice | 960.10 mi (1,545.14 km) |
