| Siena to Cabestany | 425.99 mi (685.57 km) |
| Siena to Cabries | 298.94 mi (481.10 km) |
| Siena to Cachan | 573.09 mi (922.30 km) |
| Siena to Caen | 689.11 mi (1,109.02 km) |
| Siena to Cagnes-sur-Mer | 210.99 mi (339.55 km) |
| Siena to Cahors | 498.38 mi (802.06 km) |
| Siena to Calais | 688.98 mi (1,108.81 km) |
| Siena to Caluire-et-Cuire | 362.06 mi (582.68 km) |
| Siena to Cambrai | 608.74 mi (979.67 km) |
| Siena to Canet-en-Roussillon | 422.50 mi (679.95 km) |
| Siena to Cannes | 217.25 mi (349.63 km) |
| Siena to Canteleu | 647.30 mi (1,041.73 km) |
| Siena to Capbreton | 639.66 mi (1,029.44 km) |
| Siena to Carcassonne | 451.73 mi (726.99 km) |
| Siena to Carmaux | 460.88 mi (741.72 km) |
