| Watford to Ascoli Piceno | 891.59 mi (1,434.88 km) |
| Watford to Asola | 664.75 mi (1,069.82 km) |
| Watford to Asolo | 690.31 mi (1,110.95 km) |
| Watford to Assemini | 966.65 mi (1,555.67 km) |
| Watford to Assisi | 847.49 mi (1,363.90 km) |
| Watford to Asti | 610.97 mi (983.26 km) |
| Watford to Atessa | 961.39 mi (1,547.21 km) |
| Watford to Atri | 918.88 mi (1,478.79 km) |
| Watford to Atripalda | 1,034.62 mi (1,665.06 km) |
| Watford to Augusta | 1,252.81 mi (2,016.21 km) |
| Watford to Aulla | 701.68 mi (1,129.25 km) |
| Watford to Aurisina | 761.98 mi (1,226.28 km) |
| Watford to Avellino | 1,033.41 mi (1,663.12 km) |
| Watford to Aversa | 1,011.53 mi (1,627.90 km) |
| Watford to Avezzano | 929.06 mi (1,495.17 km) |
