| Ano Syros to Opwijk | 1,378.60 mi (2,218.64 km) |
| Ano Syros to Ostend | 1,434.13 mi (2,308.00 km) |
| Ano Syros to Oud-Heverlee | 1,356.05 mi (2,182.35 km) |
| Ano Syros to Oud-Turnhout | 1,364.57 mi (2,196.06 km) |
| Ano Syros to Oudenaarde | 1,395.17 mi (2,245.31 km) |
| Ano Syros to Oudenburg | 1,429.60 mi (2,300.72 km) |
| Ano Syros to Oupeye | 1,316.43 mi (2,118.59 km) |
| Ano Syros to Overijse | 1,358.84 mi (2,186.84 km) |
| Ano Syros to Overpelt | 1,345.46 mi (2,165.30 km) |
| Ano Syros to Paal | 1,346.53 mi (2,167.03 km) |
| Ano Syros to Peer | 1,340.67 mi (2,157.60 km) |
| Ano Syros to Pepinster | 1,304.49 mi (2,099.37 km) |
| Ano Syros to Peruwelz | 1,383.26 mi (2,226.14 km) |
| Ano Syros to Perwez | 1,342.44 mi (2,160.44 km) |
| Ano Syros to Philippeville | 1,335.61 mi (2,149.45 km) |
