| Watford to Albolote | 1,009.26 mi (1,624.25 km) |
| Watford to Alboraya | 839.83 mi (1,351.58 km) |
| Watford to Albox | 989.71 mi (1,592.79 km) |
| Watford to Alcala de Guadaira | 1,024.67 mi (1,649.04 km) |
| Watford to Alcala de Henares | 784.82 mi (1,263.05 km) |
| Watford to Alcala la Real | 996.36 mi (1,603.48 km) |
| Watford to Alcanar | 768.90 mi (1,237.42 km) |
| Watford to Alcaniz | 732.76 mi (1,179.27 km) |
| Watford to Alcantarilla | 946.21 mi (1,522.79 km) |
| Watford to Alcarraz | 698.58 mi (1,124.26 km) |
| Watford to Alcaudete | 988.85 mi (1,591.39 km) |
| Watford to Alcazar de San Juan | 857.04 mi (1,379.27 km) |
| Watford to Alcira | 864.01 mi (1,390.50 km) |
| Watford to Alcobendas | 783.73 mi (1,261.29 km) |
| Watford to Alcora | 800.73 mi (1,288.65 km) |
