| Harmanli to Cookeville (Tennessee) | 5,522.43 mi (8,887.49 km) |
| Harmanli to Coolidge (Arizona) | 6,600.75 mi (10,622.88 km) |
| Harmanli to Coon Rapids (Minnesota) | 5,348.15 mi (8,607.02 km) |
| Harmanli to Cooper City (Florida) | 5,793.53 mi (9,323.78 km) |
| Harmanli to Coos Bay (Oregon) | 6,257.64 mi (10,070.69 km) |
| Harmanli to Copiague (New York) | 4,826.47 mi (7,767.45 km) |
| Harmanli to Coppell (Texas) | 6,120.72 mi (9,850.35 km) |
| Harmanli to Copperas Cove (Texas) | 6,254.20 mi (10,065.16 km) |
| Harmanli to Coral Gables (Florida) | 5,809.33 mi (9,349.22 km) |
| Harmanli to Coral Springs (Florida) | 5,781.56 mi (9,304.52 km) |
| Harmanli to Coral Terrace (Florida) | 5,808.78 mi (9,348.32 km) |
| Harmanli to Coralville (Iowa) | 5,469.33 mi (8,802.03 km) |
| Harmanli to Coram (New York) | 4,801.60 mi (7,727.42 km) |
| Harmanli to Corcoran (California) | 6,621.49 mi (10,656.27 km) |
| Harmanli to Cordele (Georgia) | 5,657.38 mi (9,104.67 km) |
