| Harmanli to Clay Cross | 1,477.80 mi (2,378.29 km) |
| Harmanli to Clayton | 1,508.54 mi (2,427.76 km) |
| Harmanli to Clayton le Moors | 1,530.09 mi (2,462.44 km) |
| Harmanli to Cleckheaton | 1,503.50 mi (2,419.65 km) |
| Harmanli to Cleethorpes | 1,434.72 mi (2,308.96 km) |
| Harmanli to Clevedon | 1,499.77 mi (2,413.65 km) |
| Harmanli to Clifton | 1,462.35 mi (2,353.43 km) |
| Harmanli to Clifton | 1,486.53 mi (2,392.34 km) |
| Harmanli to Cliftonville | 1,323.52 mi (2,130.00 km) |
| Harmanli to Clitheroe | 1,532.74 mi (2,466.71 km) |
| Harmanli to Clydebank | 1,659.06 mi (2,670.00 km) |
| Harmanli to Coalville | 1,465.64 mi (2,358.73 km) |
| Harmanli to Coatbridge | 1,644.71 mi (2,646.91 km) |
| Harmanli to Cobham | 1,396.35 mi (2,247.21 km) |
| Harmanli to Cockermouth | 1,589.00 mi (2,557.25 km) |
