| Smolyan to Chojnow | 787.40 mi (1,267.19 km) |
| Smolyan to Chorzow | 662.11 mi (1,065.57 km) |
| Smolyan to Choszczno | 908.88 mi (1,462.70 km) |
| Smolyan to Chrzanow | 643.03 mi (1,034.86 km) |
| Smolyan to Ciechanow | 802.28 mi (1,291.15 km) |
| Smolyan to Ciechocinek | 827.93 mi (1,332.42 km) |
| Smolyan to Cieszyn | 635.26 mi (1,022.35 km) |
| Smolyan to Czarna Bialostocka | 812.20 mi (1,307.12 km) |
| Smolyan to Czarnkow | 868.71 mi (1,398.06 km) |
| Smolyan to Czechowice-Dziedzice | 637.19 mi (1,025.46 km) |
| Smolyan to Czeladz | 661.56 mi (1,064.67 km) |
| Smolyan to Czersk Pomorski | 898.75 mi (1,446.39 km) |
| Smolyan to Czestochowa | 690.04 mi (1,110.52 km) |
| Smolyan to Czluchow | 900.87 mi (1,449.81 km) |
| Smolyan to Dabrowa Gornicza | 658.81 mi (1,060.26 km) |
