| Castano Primo to Orzesze | 560.76 mi (902.45 km) |
| Castano Primo to Osowa | 748.21 mi (1,204.13 km) |
| Castano Primo to Ostroda | 752.15 mi (1,210.47 km) |
| Castano Primo to Ostroleka | 773.95 mi (1,245.56 km) |
| Castano Primo to Ostrow Mazowiecka | 774.34 mi (1,246.18 km) |
| Castano Primo to Ostrow Wielkopolski | 589.58 mi (948.83 km) |
| Castano Primo to Ostrowiec Swietokrzyski | 688.72 mi (1,108.39 km) |
| Castano Primo to Ostrzeszow | 582.75 mi (937.84 km) |
| Castano Primo to Oswiecim | 575.09 mi (925.52 km) |
| Castano Primo to Otwock | 725.67 mi (1,167.85 km) |
| Castano Primo to Ozarow Mazowiecki | 713.31 mi (1,147.96 km) |
| Castano Primo to Ozimek | 560.68 mi (902.34 km) |
| Castano Primo to Ozorkow | 651.52 mi (1,048.52 km) |
| Castano Primo to Pabianice | 641.48 mi (1,032.36 km) |
| Castano Primo to Parczew | 767.33 mi (1,234.90 km) |
