| Ilhavo to Opole | 1,450.01 mi (2,333.56 km) |
| Ilhavo to Orzesze | 1,473.82 mi (2,371.89 km) |
| Ilhavo to Osowa | 1,569.87 mi (2,526.46 km) |
| Ilhavo to Ostroda | 1,604.28 mi (2,581.85 km) |
| Ilhavo to Ostroleka | 1,650.24 mi (2,655.81 km) |
| Ilhavo to Ostrow Mazowiecka | 1,657.47 mi (2,667.44 km) |
| Ilhavo to Ostrow Wielkopolski | 1,468.02 mi (2,362.55 km) |
| Ilhavo to Ostrowiec Swietokrzyski | 1,600.37 mi (2,575.54 km) |
| Ilhavo to Ostrzeszow | 1,467.09 mi (2,361.05 km) |
| Ilhavo to Oswiecim | 1,491.87 mi (2,400.93 km) |
| Ilhavo to Otwock | 1,617.59 mi (2,603.26 km) |
| Ilhavo to Ozarow Mazowiecki | 1,600.90 mi (2,576.40 km) |
| Ilhavo to Ozimek | 1,461.79 mi (2,352.52 km) |
| Ilhavo to Ozorkow | 1,534.40 mi (2,469.38 km) |
| Ilhavo to Pabianice | 1,531.22 mi (2,464.26 km) |
