| Grammichele to Opwijk | 1,080.10 mi (1,738.25 km) |
| Grammichele to Ostend | 1,125.50 mi (1,811.31 km) |
| Grammichele to Oud-Heverlee | 1,061.14 mi (1,707.74 km) |
| Grammichele to Oud-Turnhout | 1,082.95 mi (1,742.83 km) |
| Grammichele to Oudenaarde | 1,087.32 mi (1,749.87 km) |
| Grammichele to Oudenburg | 1,121.09 mi (1,804.22 km) |
| Grammichele to Oupeye | 1,032.26 mi (1,661.26 km) |
| Grammichele to Overijse | 1,061.25 mi (1,707.92 km) |
| Grammichele to Overpelt | 1,067.79 mi (1,718.45 km) |
| Grammichele to Paal | 1,062.22 mi (1,709.48 km) |
| Grammichele to Peer | 1,061.94 mi (1,709.03 km) |
| Grammichele to Pepinster | 1,020.02 mi (1,641.56 km) |
| Grammichele to Peruwelz | 1,068.77 mi (1,720.01 km) |
| Grammichele to Perwez | 1,045.42 mi (1,682.45 km) |
| Grammichele to Philippeville | 1,026.82 mi (1,652.51 km) |
