| Saint-Cyr-sur-Mer to Opwijk | 542.50 mi (873.06 km) |
| Saint-Cyr-sur-Mer to Ostend | 570.77 mi (918.56 km) |
| Saint-Cyr-sur-Mer to Oud-Heverlee | 530.80 mi (854.24 km) |
| Saint-Cyr-sur-Mer to Oud-Turnhout | 562.96 mi (906.00 km) |
| Saint-Cyr-sur-Mer to Oudenaarde | 538.87 mi (867.22 km) |
| Saint-Cyr-sur-Mer to Oudenburg | 567.07 mi (912.61 km) |
| Saint-Cyr-sur-Mer to Oupeye | 519.92 mi (836.72 km) |
| Saint-Cyr-sur-Mer to Overijse | 527.98 mi (849.71 km) |
| Saint-Cyr-sur-Mer to Overpelt | 555.20 mi (893.51 km) |
| Saint-Cyr-sur-Mer to Paal | 543.35 mi (874.44 km) |
| Saint-Cyr-sur-Mer to Peer | 549.37 mi (884.12 km) |
| Saint-Cyr-sur-Mer to Pepinster | 510.15 mi (821.00 km) |
| Saint-Cyr-sur-Mer to Peruwelz | 516.47 mi (831.17 km) |
| Saint-Cyr-sur-Mer to Perwez | 515.81 mi (830.11 km) |
| Saint-Cyr-sur-Mer to Philippeville | 487.87 mi (785.15 km) |
