| Onex to Opole | 623.72 mi (1,003.77 km) |
| Onex to Orzesze | 643.07 mi (1,034.91 km) |
| Onex to Osowa | 786.78 mi (1,266.21 km) |
| Onex to Ostroda | 803.73 mi (1,293.47 km) |
| Onex to Ostroleka | 837.11 mi (1,347.20 km) |
| Onex to Ostrow Mazowiecka | 840.91 mi (1,353.32 km) |
| Onex to Ostrow Wielkopolski | 651.17 mi (1,047.96 km) |
| Onex to Ostrowiec Swietokrzyski | 770.88 mi (1,240.61 km) |
| Onex to Ostrzeszow | 647.46 mi (1,041.99 km) |
| Onex to Oswiecim | 660.17 mi (1,062.44 km) |
| Onex to Otwock | 796.36 mi (1,281.62 km) |
| Onex to Ozarow Mazowiecki | 781.53 mi (1,257.75 km) |
| Onex to Ozimek | 635.02 mi (1,021.96 km) |
| Onex to Ozorkow | 716.45 mi (1,153.02 km) |
| Onex to Pabianice | 710.03 mi (1,142.68 km) |
