| Costessey to Opwijk | 172.47 mi (277.57 km) |
| Costessey to Ostend | 122.82 mi (197.65 km) |
| Costessey to Oud-Heverlee | 194.18 mi (312.51 km) |
| Costessey to Oud-Turnhout | 185.20 mi (298.04 km) |
| Costessey to Oudenaarde | 161.35 mi (259.66 km) |
| Costessey to Oudenburg | 127.24 mi (204.77 km) |
| Costessey to Oupeye | 232.64 mi (374.40 km) |
| Costessey to Overijse | 192.26 mi (309.41 km) |
| Costessey to Overpelt | 204.80 mi (329.60 km) |
| Costessey to Paal | 202.59 mi (326.04 km) |
| Costessey to Peer | 209.19 mi (336.65 km) |
| Costessey to Pepinster | 244.63 mi (393.70 km) |
| Costessey to Peruwelz | 179.59 mi (289.02 km) |
| Costessey to Perwez | 208.77 mi (335.98 km) |
| Costessey to Philippeville | 222.48 mi (358.05 km) |
