| Siena to Creutzwald | 462.91 mi (744.98 km) |
| Siena to Croissy-sur-Seine | 583.54 mi (939.12 km) |
| Siena to Croix | 637.30 mi (1,025.63 km) |
| Siena to Crosne | 565.17 mi (909.55 km) |
| Siena to Cuers | 264.64 mi (425.89 km) |
| Siena to Cugnaux | 501.10 mi (806.44 km) |
| Siena to Cusset | 432.51 mi (696.06 km) |
| Siena to Dammarie-le-Lys | 550.37 mi (885.73 km) |
| Siena to Dammartin-en-Goele | 572.27 mi (920.97 km) |
| Siena to Dardilly | 366.45 mi (589.74 km) |
| Siena to Darnetal | 642.92 mi (1,034.67 km) |
| Siena to Dax | 620.40 mi (998.44 km) |
| Siena to Decines-Charpieu | 356.41 mi (573.59 km) |
| Siena to Denain | 611.96 mi (984.86 km) |
| Siena to Deuil-la-Barre | 581.19 mi (935.33 km) |
