| Grammichele to Orzesze | 916.70 mi (1,475.29 km) |
| Grammichele to Osowa | 1,203.06 mi (1,936.15 km) |
| Grammichele to Ostroda | 1,167.13 mi (1,878.31 km) |
| Grammichele to Ostroleka | 1,144.85 mi (1,842.45 km) |
| Grammichele to Ostrow Mazowiecka | 1,132.38 mi (1,822.39 km) |
| Grammichele to Ostrow Wielkopolski | 1,009.35 mi (1,624.40 km) |
| Grammichele to Ostrowiec Swietokrzyski | 1,004.51 mi (1,616.61 km) |
| Grammichele to Ostrzeszow | 994.44 mi (1,600.40 km) |
| Grammichele to Oswiecim | 914.75 mi (1,472.15 km) |
| Grammichele to Otwock | 1,078.83 mi (1,736.21 km) |
| Grammichele to Ozarow Mazowiecki | 1,078.83 mi (1,736.21 km) |
| Grammichele to Ozimek | 946.46 mi (1,523.18 km) |
| Grammichele to Ozorkow | 1,044.04 mi (1,680.23 km) |
| Grammichele to Pabianice | 1,023.95 mi (1,647.89 km) |
| Grammichele to Parczew | 1,074.19 mi (1,728.74 km) |
