| Darby to Opole | 4,284.67 mi (6,895.51 km) |
| Darby to Orzesze | 4,333.72 mi (6,974.44 km) |
| Darby to Osowa | 4,177.84 mi (6,723.58 km) |
| Darby to Ostroda | 4,255.27 mi (6,848.19 km) |
| Darby to Ostroleka | 4,334.28 mi (6,975.34 km) |
| Darby to Ostrow Mazowiecka | 4,355.70 mi (7,009.82 km) |
| Darby to Ostrow Wielkopolski | 4,246.72 mi (6,834.44 km) |
| Darby to Ostrowiec Swietokrzyski | 4,405.16 mi (7,089.42 km) |
| Darby to Ostrzeszow | 4,259.00 mi (6,854.20 km) |
| Darby to Oswiecim | 4,355.63 mi (7,009.70 km) |
| Darby to Otwock | 4,357.47 mi (7,012.67 km) |
| Darby to Ozarow Mazowiecki | 4,336.97 mi (6,979.67 km) |
| Darby to Ozimek | 4,295.07 mi (6,912.24 km) |
| Darby to Ozorkow | 4,290.28 mi (6,904.53 km) |
| Darby to Pabianice | 4,304.98 mi (6,928.19 km) |
