| Castelfidardo to Orzesze | 523.10 mi (841.85 km) |
| Castelfidardo to Osowa | 789.26 mi (1,270.19 km) |
| Castelfidardo to Ostroda | 764.94 mi (1,231.05 km) |
| Castelfidardo to Ostroleka | 758.04 mi (1,219.96 km) |
| Castelfidardo to Ostrow Mazowiecka | 750.19 mi (1,207.31 km) |
| Castelfidardo to Ostrow Wielkopolski | 599.30 mi (964.49 km) |
| Castelfidardo to Ostrowiec Swietokrzyski | 633.47 mi (1,019.48 km) |
| Castelfidardo to Ostrzeszow | 586.20 mi (943.39 km) |
| Castelfidardo to Oswiecim | 527.37 mi (848.71 km) |
| Castelfidardo to Otwock | 696.13 mi (1,120.32 km) |
| Castelfidardo to Ozarow Mazowiecki | 691.21 mi (1,112.39 km) |
| Castelfidardo to Ozimek | 544.09 mi (875.62 km) |
| Castelfidardo to Ozorkow | 644.68 mi (1,037.51 km) |
| Castelfidardo to Pabianice | 627.18 mi (1,009.34 km) |
| Castelfidardo to Parczew | 711.21 mi (1,144.59 km) |
