| Watford to Lapua | 1,160.12 mi (1,867.03 km) |
| Watford to Laukaa | 1,224.08 mi (1,969.97 km) |
| Watford to Lauritsala | 1,260.05 mi (2,027.86 km) |
| Watford to Lempaala | 1,126.81 mi (1,813.43 km) |
| Watford to Leppavirta | 1,279.83 mi (2,059.69 km) |
| Watford to Lieksa | 1,366.36 mi (2,198.95 km) |
| Watford to Lieto | 1,063.32 mi (1,711.25 km) |
| Watford to Liminka | 1,289.49 mi (2,075.23 km) |
| Watford to Liperi | 1,328.19 mi (2,137.51 km) |
| Watford to Lohja | 1,107.32 mi (1,782.05 km) |
| Watford to Loimaa | 1,092.18 mi (1,757.70 km) |
| Watford to Loviisa | 1,181.76 mi (1,901.87 km) |
| Watford to Mantsala | 1,156.60 mi (1,861.37 km) |
| Watford to Mariehamn | 973.85 mi (1,567.26 km) |
| Watford to Masku | 1,054.65 mi (1,697.30 km) |
