| Watford to Chojnice | 762.78 mi (1,227.57 km) |
| Watford to Chojnow | 701.99 mi (1,129.74 km) |
| Watford to Chorzow | 844.27 mi (1,358.72 km) |
| Watford to Choszczno | 673.14 mi (1,083.32 km) |
| Watford to Chrzanow | 866.38 mi (1,394.31 km) |
| Watford to Ciechanow | 890.02 mi (1,432.36 km) |
| Watford to Ciechocinek | 812.90 mi (1,308.23 km) |
| Watford to Cieszyn | 840.57 mi (1,352.76 km) |
| Watford to Czarna Bialostocka | 998.28 mi (1,606.58 km) |
| Watford to Czarnkow | 720.49 mi (1,159.52 km) |
| Watford to Czechowice-Dziedzice | 853.47 mi (1,373.52 km) |
| Watford to Czeladz | 849.44 mi (1,367.03 km) |
| Watford to Czersk Pomorski | 780.45 mi (1,256.01 km) |
| Watford to Czestochowa | 843.81 mi (1,357.97 km) |
| Watford to Czluchow | 755.15 mi (1,215.30 km) |
