| Harrow to Chojnice | 762.28 mi (1,226.77 km) |
| Harrow to Chojnow | 700.26 mi (1,126.95 km) |
| Harrow to Chorzow | 842.28 mi (1,355.51 km) |
| Harrow to Choszczno | 672.41 mi (1,082.14 km) |
| Harrow to Chrzanow | 864.35 mi (1,391.04 km) |
| Harrow to Ciechanow | 889.15 mi (1,430.95 km) |
| Harrow to Ciechocinek | 812.01 mi (1,306.80 km) |
| Harrow to Cieszyn | 838.34 mi (1,349.17 km) |
| Harrow to Czarna Bialostocka | 997.61 mi (1,605.49 km) |
| Harrow to Czarnkow | 719.61 mi (1,158.10 km) |
| Harrow to Czechowice-Dziedzice | 851.33 mi (1,370.08 km) |
| Harrow to Czeladz | 847.46 mi (1,363.86 km) |
| Harrow to Czersk Pomorski | 779.99 mi (1,255.27 km) |
| Harrow to Czestochowa | 842.02 mi (1,355.11 km) |
| Harrow to Czluchow | 754.64 mi (1,214.48 km) |
