| Smolyan to Cottbus | 856.07 mi (1,377.71 km) |
| Smolyan to Crailsheim | 878.81 mi (1,414.31 km) |
| Smolyan to Cremlingen | 987.77 mi (1,589.66 km) |
| Smolyan to Crimmitschau | 865.98 mi (1,393.66 km) |
| Smolyan to Cuxhaven | 1,123.08 mi (1,807.42 km) |
| Smolyan to Dachau | 794.48 mi (1,278.59 km) |
| Smolyan to Dallgow-Doberitz | 931.90 mi (1,499.75 km) |
| Smolyan to Damme | 1,078.94 mi (1,736.38 km) |
| Smolyan to Darmstadt | 959.53 mi (1,544.21 km) |
| Smolyan to Dassel | 998.60 mi (1,607.09 km) |
| Smolyan to Datteln | 1,073.49 mi (1,727.61 km) |
| Smolyan to Dautphe | 999.55 mi (1,608.62 km) |
| Smolyan to Deggendorf | 758.16 mi (1,220.15 km) |
| Smolyan to Delbruck | 1,035.01 mi (1,665.69 km) |
| Smolyan to Delitzsch | 901.24 mi (1,450.41 km) |
