| Cities | Distance |
|---|---|
| Siena to Opwijk | 625.52 mi (1,006.68 km) |
| Siena to Ostend | 672.87 mi (1,082.89 km) |
| Siena to Oud-Heverlee | 606.02 mi (975.30 km) |
| Siena to Oud-Turnhout | 627.00 mi (1,009.05 km) |
| Siena to Oudenaarde | 634.16 mi (1,020.57 km) |
| Siena to Oudenburg | 668.40 mi (1,075.68 km) |
| Siena to Oupeye | 576.24 mi (927.36 km) |
| Siena to Overijse | 606.42 mi (975.93 km) |
| Siena to Overpelt | 611.66 mi (984.38 km) |
| Siena to Paal | 606.32 mi (975.78 km) |
| Siena to Peer | 605.82 mi (974.98 km) |
| Siena to Pepinster | 563.97 mi (907.62 km) |
| Siena to Peruwelz | 616.60 mi (992.32 km) |
| Siena to Perwez | 590.40 mi (950.16 km) |
| Siena to Philippeville | 573.15 mi (922.40 km) |