| Kastamonu to Lapua | 1,555.29 mi (2,503.00 km) |
| Kastamonu to Laukaa | 1,489.02 mi (2,396.35 km) |
| Kastamonu to Lauritsala | 1,380.37 mi (2,221.48 km) |
| Kastamonu to Lempaala | 1,440.23 mi (2,317.83 km) |
| Kastamonu to Leppavirta | 1,479.57 mi (2,381.14 km) |
| Kastamonu to Lieksa | 1,523.59 mi (2,451.99 km) |
| Kastamonu to Lieto | 1,405.69 mi (2,262.24 km) |
| Kastamonu to Liminka | 1,652.45 mi (2,659.35 km) |
| Kastamonu to Liperi | 1,472.91 mi (2,370.42 km) |
| Kastamonu to Lohja | 1,367.82 mi (2,201.29 km) |
| Kastamonu to Loimaa | 1,419.28 mi (2,284.11 km) |
| Kastamonu to Loviisa | 1,356.67 mi (2,183.35 km) |
| Kastamonu to Mantsala | 1,377.76 mi (2,217.30 km) |
| Kastamonu to Mariehamn | 1,421.59 mi (2,287.83 km) |
| Kastamonu to Masku | 1,415.21 mi (2,277.56 km) |
