| Glen Parva to Opole | 827.17 mi (1,331.20 km) |
| Glen Parva to Orzesze | 872.29 mi (1,403.82 km) |
| Glen Parva to Osowa | 813.94 mi (1,309.91 km) |
| Glen Parva to Ostroda | 875.74 mi (1,409.36 km) |
| Glen Parva to Ostroleka | 945.46 mi (1,521.58 km) |
| Glen Parva to Ostrow Mazowiecka | 961.70 mi (1,547.71 km) |
| Glen Parva to Ostrow Wielkopolski | 805.42 mi (1,296.19 km) |
| Glen Parva to Ostrowiec Swietokrzyski | 967.58 mi (1,557.16 km) |
| Glen Parva to Ostrzeszow | 813.83 mi (1,309.74 km) |
| Glen Parva to Oswiecim | 894.56 mi (1,439.66 km) |
| Glen Parva to Otwock | 943.28 mi (1,518.07 km) |
| Glen Parva to Ozarow Mazowiecki | 922.57 mi (1,484.74 km) |
| Glen Parva to Ozimek | 838.78 mi (1,349.89 km) |
| Glen Parva to Ozorkow | 862.46 mi (1,388.00 km) |
| Glen Parva to Pabianice | 871.06 mi (1,401.84 km) |
