| Smolyan to Cogolin | 932.08 mi (1,500.04 km) |
| Smolyan to Colmar | 958.14 mi (1,541.98 km) |
| Smolyan to Colombes | 1,197.93 mi (1,927.88 km) |
| Smolyan to Colomiers | 1,192.53 mi (1,919.19 km) |
| Smolyan to Combs-la-Ville | 1,179.54 mi (1,898.29 km) |
| Smolyan to Comines | 1,209.47 mi (1,946.45 km) |
| Smolyan to Compiegne | 1,183.70 mi (1,904.98 km) |
| Smolyan to Concarneau | 1,460.88 mi (2,351.06 km) |
| Smolyan to Conde-sur-l'Escaut | 1,177.49 mi (1,894.99 km) |
| Smolyan to Conflans-Sainte-Honorine | 1,206.11 mi (1,941.04 km) |
| Smolyan to Corbas | 1,026.60 mi (1,652.15 km) |
| Smolyan to Corbeil-Essonnes | 1,181.89 mi (1,902.07 km) |
| Smolyan to Cormeilles-en-Parisis | 1,201.13 mi (1,933.03 km) |
| Smolyan to Cosne sur Loire | 1,141.50 mi (1,837.07 km) |
| Smolyan to Coudekerque-Branche | 1,241.33 mi (1,997.73 km) |
