| Mortara to Orzesze | 574.41 mi (924.42 km) |
| Mortara to Osowa | 766.38 mi (1,233.37 km) |
| Mortara to Ostroda | 769.18 mi (1,237.88 km) |
| Mortara to Ostroleka | 789.72 mi (1,270.93 km) |
| Mortara to Ostrow Mazowiecka | 789.70 mi (1,270.91 km) |
| Mortara to Ostrow Wielkopolski | 605.86 mi (975.04 km) |
| Mortara to Ostrowiec Swietokrzyski | 702.09 mi (1,129.91 km) |
| Mortara to Ostrzeszow | 598.69 mi (963.51 km) |
| Mortara to Oswiecim | 588.26 mi (946.72 km) |
| Mortara to Otwock | 740.59 mi (1,191.86 km) |
| Mortara to Ozarow Mazowiecki | 728.56 mi (1,172.51 km) |
| Mortara to Ozimek | 575.48 mi (926.15 km) |
| Mortara to Ozorkow | 667.29 mi (1,073.90 km) |
| Mortara to Pabianice | 656.83 mi (1,057.07 km) |
| Mortara to Parczew | 780.97 mi (1,256.85 km) |
