| Watford to Alhendin | 1,017.00 mi (1,636.71 km) |
| Watford to Alicante | 919.62 mi (1,479.99 km) |
| Watford to Aljaraque | 1,045.31 mi (1,682.26 km) |
| Watford to Almagro | 896.50 mi (1,442.78 km) |
| Watford to Almansa | 884.13 mi (1,422.87 km) |
| Watford to Almazora | 809.56 mi (1,302.87 km) |
| Watford to Almendralejo | 942.22 mi (1,516.35 km) |
| Watford to Almeria | 1,028.61 mi (1,655.39 km) |
| Watford to Almonte | 1,038.03 mi (1,670.55 km) |
| Watford to Almoradi | 936.08 mi (1,506.48 km) |
| Watford to Almunecar | 1,043.51 mi (1,679.37 km) |
| Watford to Almusafes | 854.32 mi (1,374.89 km) |
| Watford to Alovera | 776.01 mi (1,248.86 km) |
| Watford to Alpedrete | 779.22 mi (1,254.03 km) |
| Watford to Altea | 902.26 mi (1,452.05 km) |
