| Groves to Opole | 5,495.08 mi (8,843.48 km) |
| Groves to Orzesze | 5,545.08 mi (8,923.95 km) |
| Groves to Osowa | 5,364.47 mi (8,633.28 km) |
| Groves to Ostroda | 5,443.03 mi (8,759.71 km) |
| Groves to Ostroleka | 5,522.04 mi (8,886.86 km) |
| Groves to Ostrow Mazowiecka | 5,544.27 mi (8,922.64 km) |
| Groves to Ostrow Wielkopolski | 5,451.98 mi (8,774.11 km) |
| Groves to Ostrowiec Swietokrzyski | 5,606.10 mi (9,022.15 km) |
| Groves to Ostrzeszow | 5,465.30 mi (8,795.56 km) |
| Groves to Oswiecim | 5,566.54 mi (8,958.47 km) |
| Groves to Otwock | 5,551.85 mi (8,934.84 km) |
| Groves to Ozarow Mazowiecki | 5,531.91 mi (8,902.76 km) |
| Groves to Ozimek | 5,504.83 mi (8,859.17 km) |
| Groves to Ozorkow | 5,490.36 mi (8,835.89 km) |
| Groves to Pabianice | 5,506.67 mi (8,862.13 km) |
