| Frederiksvaerk to Opwijk | 471.83 mi (759.34 km) |
| Frederiksvaerk to Ostend | 495.73 mi (797.80 km) |
| Frederiksvaerk to Oud-Heverlee | 465.84 mi (749.69 km) |
| Frederiksvaerk to Oud-Turnhout | 431.11 mi (693.80 km) |
| Frederiksvaerk to Oudenaarde | 494.47 mi (795.77 km) |
| Frederiksvaerk to Oudenburg | 495.35 mi (797.18 km) |
| Frederiksvaerk to Oupeye | 448.09 mi (721.13 km) |
| Frederiksvaerk to Overijse | 472.13 mi (759.82 km) |
| Frederiksvaerk to Overpelt | 425.02 mi (684.00 km) |
| Frederiksvaerk to Paal | 441.18 mi (710.01 km) |
| Frederiksvaerk to Peer | 428.72 mi (689.96 km) |
| Frederiksvaerk to Pepinster | 452.21 mi (727.77 km) |
| Frederiksvaerk to Peruwelz | 512.51 mi (824.81 km) |
| Frederiksvaerk to Perwez | 473.53 mi (762.07 km) |
| Frederiksvaerk to Philippeville | 504.16 mi (811.37 km) |
