| Caernarfon to Leigh-on-Sea | 235.26 mi (378.61 km) |
| Caernarfon to Leighton Buzzard | 173.61 mi (279.40 km) |
| Caernarfon to Leith | 201.11 mi (323.65 km) |
| Caernarfon to Lemington | 163.36 mi (262.90 km) |
| Caernarfon to Leominster | 89.91 mi (144.69 km) |
| Caernarfon to Lerwick | 498.87 mi (802.86 km) |
| Caernarfon to Letchworth | 187.70 mi (302.07 km) |
| Caernarfon to Leven | 217.14 mi (349.45 km) |
| Caernarfon to Lewes | 240.05 mi (386.33 km) |
| Caernarfon to Leyland | 75.17 mi (120.97 km) |
| Caernarfon to Leyton | 209.73 mi (337.53 km) |
| Caernarfon to Lichfield | 106.51 mi (171.41 km) |
| Caernarfon to Lincoln | 154.58 mi (248.78 km) |
| Caernarfon to Linlithgow | 197.93 mi (318.54 km) |
| Caernarfon to Linslade | 172.76 mi (278.03 km) |
