| Harrow to Cabestany | 634.10 mi (1,020.48 km) |
| Harrow to Cabries | 622.36 mi (1,001.60 km) |
| Harrow to Cachan | 226.34 mi (364.25 km) |
| Harrow to Caen | 166.08 mi (267.27 km) |
| Harrow to Cagnes-sur-Mer | 648.25 mi (1,043.26 km) |
| Harrow to Cahors | 499.88 mi (804.49 km) |
| Harrow to Calais | 104.86 mi (168.76 km) |
| Harrow to Caluire-et-Cuire | 464.55 mi (747.62 km) |
| Harrow to Cambrai | 183.91 mi (295.97 km) |
| Harrow to Canet-en-Roussillon | 633.15 mi (1,018.96 km) |
| Harrow to Cannes | 651.71 mi (1,048.83 km) |
| Harrow to Canteleu | 159.36 mi (256.47 km) |
| Harrow to Capbreton | 551.03 mi (886.79 km) |
| Harrow to Carcassonne | 592.03 mi (952.79 km) |
| Harrow to Carmaux | 533.30 mi (858.27 km) |
