| Harmanli to Coueron | 1,399.52 mi (2,252.31 km) |
| Harmanli to Coulommiers | 1,199.26 mi (1,930.03 km) |
| Harmanli to Courbevoic | 1,237.24 mi (1,991.15 km) |
| Harmanli to Courcouronnes | 1,224.97 mi (1,971.40 km) |
| Harmanli to Cournon-d'Auvergne | 1,157.40 mi (1,862.65 km) |
| Harmanli to Courrieres | 1,238.58 mi (1,993.29 km) |
| Harmanli to Coutras | 1,316.48 mi (2,118.67 km) |
| Harmanli to Couzeix | 1,252.16 mi (2,015.15 km) |
| Harmanli to Cran-Gevrier | 1,019.72 mi (1,641.08 km) |
| Harmanli to Craponne | 1,084.20 mi (1,744.86 km) |
| Harmanli to Creil | 1,233.46 mi (1,985.07 km) |
| Harmanli to Crepy-en-Valois | 1,215.46 mi (1,956.09 km) |
| Harmanli to Crest | 1,063.83 mi (1,712.07 km) |
| Harmanli to Creteil | 1,226.21 mi (1,973.40 km) |
| Harmanli to Creutzwald | 1,051.84 mi (1,692.77 km) |
