| Caerphilly to Lapua | 1,241.52 mi (1,998.03 km) |
| Caerphilly to Laukaa | 1,310.91 mi (2,109.71 km) |
| Caerphilly to Lauritsala | 1,354.09 mi (2,179.20 km) |
| Caerphilly to Lempaala | 1,216.51 mi (1,957.78 km) |
| Caerphilly to Leppavirta | 1,367.80 mi (2,201.27 km) |
| Caerphilly to Lieksa | 1,452.52 mi (2,337.60 km) |
| Caerphilly to Lieto | 1,155.50 mi (1,859.60 km) |
| Caerphilly to Liminka | 1,365.42 mi (2,197.43 km) |
| Caerphilly to Liperi | 1,417.07 mi (2,280.56 km) |
| Caerphilly to Lohja | 1,201.99 mi (1,934.42 km) |
| Caerphilly to Loimaa | 1,183.34 mi (1,904.40 km) |
| Caerphilly to Loviisa | 1,277.06 mi (2,055.23 km) |
| Caerphilly to Mantsala | 1,250.56 mi (2,012.59 km) |
| Caerphilly to Mariehamn | 1,065.28 mi (1,714.40 km) |
| Caerphilly to Masku | 1,146.17 mi (1,844.58 km) |
