| Siena to Chaudfontaine | 568.97 mi (915.68 km) |
| Siena to Chaumont-Gistoux | 596.77 mi (960.40 km) |
| Siena to Chimay | 571.19 mi (919.24 km) |
| Siena to Ciney | 564.82 mi (908.98 km) |
| Siena to Colfontaine | 603.22 mi (970.79 km) |
| Siena to Courcelles | 592.06 mi (952.82 km) |
| Siena to Court-Saint-Etienne | 597.05 mi (960.86 km) |
| Siena to Couvin | 566.65 mi (911.94 km) |
| Siena to Damme | 664.43 mi (1,069.30 km) |
| Siena to De Haan | 672.34 mi (1,082.02 km) |
| Siena to De Panne | 675.39 mi (1,086.93 km) |
| Siena to De Pinte | 641.06 mi (1,031.68 km) |
| Siena to Deerlijk | 641.01 mi (1,031.60 km) |
| Siena to Deinze | 643.22 mi (1,035.16 km) |
| Siena to Denderleeuw | 623.36 mi (1,003.20 km) |
