| Trecate to Orzesze | 567.03 mi (912.55 km) |
| Trecate to Osowa | 755.94 mi (1,216.57 km) |
| Trecate to Ostroda | 759.54 mi (1,222.37 km) |
| Trecate to Ostroleka | 780.95 mi (1,256.81 km) |
| Trecate to Ostrow Mazowiecka | 781.20 mi (1,257.23 km) |
| Trecate to Ostrow Wielkopolski | 596.73 mi (960.34 km) |
| Trecate to Ostrowiec Swietokrzyski | 694.91 mi (1,118.35 km) |
| Trecate to Ostrzeszow | 589.79 mi (949.18 km) |
| Trecate to Oswiecim | 581.21 mi (935.36 km) |
| Trecate to Otwock | 732.38 mi (1,178.65 km) |
| Trecate to Ozarow Mazowiecki | 720.13 mi (1,158.94 km) |
| Trecate to Ozimek | 567.35 mi (913.06 km) |
| Trecate to Ozorkow | 658.51 mi (1,059.77 km) |
| Trecate to Pabianice | 648.33 mi (1,043.39 km) |
| Trecate to Parczew | 773.62 mi (1,245.02 km) |
