| Watford to Liria | 831.19 mi (1,337.68 km) |
| Watford to Llagostera | 696.34 mi (1,120.65 km) |
| Watford to Llanera | 621.44 mi (1,000.12 km) |
| Watford to Llanes | 603.88 mi (971.85 km) |
| Watford to Lleida | 695.28 mi (1,118.94 km) |
| Watford to Lloret de Mar | 704.46 mi (1,133.73 km) |
| Watford to Lluchmayor | 855.18 mi (1,376.28 km) |
| Watford to Loeches | 791.85 mi (1,274.35 km) |
| Watford to Logrono | 642.19 mi (1,033.50 km) |
| Watford to Loja | 1,017.70 mi (1,637.82 km) |
| Watford to Lora del Rio | 999.22 mi (1,608.09 km) |
| Watford to Lorca | 967.66 mi (1,557.30 km) |
| Watford to Los Alcazares | 961.44 mi (1,547.29 km) |
| Watford to Los Barrios | 1,097.89 mi (1,766.88 km) |
| Watford to Los Corrales de Buelna | 604.52 mi (972.89 km) |
