| Grays to Opole | 764.44 mi (1,230.24 km) |
| Grays to Orzesze | 807.19 mi (1,299.05 km) |
| Grays to Osowa | 779.79 mi (1,254.94 km) |
| Grays to Ostroda | 835.69 mi (1,344.92 km) |
| Grays to Ostroleka | 901.23 mi (1,450.38 km) |
| Grays to Ostrow Mazowiecka | 915.81 mi (1,473.85 km) |
| Grays to Ostrow Wielkopolski | 749.39 mi (1,206.03 km) |
| Grays to Ostrowiec Swietokrzyski | 909.74 mi (1,464.09 km) |
| Grays to Ostrzeszow | 756.23 mi (1,217.03 km) |
| Grays to Oswiecim | 829.33 mi (1,334.68 km) |
| Grays to Otwock | 892.65 mi (1,436.58 km) |
| Grays to Ozarow Mazowiecki | 872.34 mi (1,403.89 km) |
| Grays to Ozimek | 776.38 mi (1,249.46 km) |
| Grays to Ozorkow | 809.67 mi (1,303.03 km) |
| Grays to Pabianice | 816.15 mi (1,313.47 km) |
