| Preakness to Opole | 4,196.66 mi (6,753.87 km) |
| Preakness to Orzesze | 4,245.76 mi (6,832.88 km) |
| Preakness to Osowa | 4,089.15 mi (6,580.85 km) |
| Preakness to Ostroda | 4,166.60 mi (6,705.50 km) |
| Preakness to Ostroleka | 4,245.62 mi (6,832.67 km) |
| Preakness to Ostrow Mazowiecka | 4,267.06 mi (6,867.18 km) |
| Preakness to Ostrow Wielkopolski | 4,158.51 mi (6,692.48 km) |
| Preakness to Ostrowiec Swietokrzyski | 4,316.84 mi (6,947.28 km) |
| Preakness to Ostrzeszow | 4,170.83 mi (6,712.30 km) |
| Preakness to Oswiecim | 4,267.65 mi (6,868.12 km) |
| Preakness to Otwock | 4,268.96 mi (6,870.23 km) |
| Preakness to Ozarow Mazowiecki | 4,248.47 mi (6,837.25 km) |
| Preakness to Ozimek | 4,207.03 mi (6,770.57 km) |
| Preakness to Ozorkow | 4,201.91 mi (6,762.32 km) |
| Preakness to Pabianice | 4,216.66 mi (6,786.06 km) |
