| Siirt to Opwijk | 2,039.83 mi (3,282.79 km) |
| Siirt to Ostend | 2,097.08 mi (3,374.92 km) |
| Siirt to Oud-Heverlee | 2,017.35 mi (3,246.61 km) |
| Siirt to Oud-Turnhout | 2,010.99 mi (3,236.37 km) |
| Siirt to Oudenaarde | 2,063.23 mi (3,320.46 km) |
| Siirt to Oudenburg | 2,093.11 mi (3,368.53 km) |
| Siirt to Oupeye | 1,973.82 mi (3,176.56 km) |
| Siirt to Overijse | 2,022.36 mi (3,254.68 km) |
| Siirt to Overpelt | 1,991.18 mi (3,204.49 km) |
| Siirt to Paal | 1,998.78 mi (3,216.72 km) |
| Siirt to Peer | 1,988.32 mi (3,199.88 km) |
| Siirt to Pepinster | 1,964.29 mi (3,161.22 km) |
| Siirt to Peruwelz | 2,059.83 mi (3,314.97 km) |
| Siirt to Perwez | 2,008.10 mi (3,231.73 km) |
| Siirt to Philippeville | 2,014.01 mi (3,241.23 km) |
