| Harrow to Liria | 826.29 mi (1,329.79 km) |
| Harrow to Llagostera | 691.04 mi (1,112.12 km) |
| Harrow to Llanera | 618.00 mi (994.57 km) |
| Harrow to Llanes | 600.06 mi (965.71 km) |
| Harrow to Lleida | 690.20 mi (1,110.77 km) |
| Harrow to Lloret de Mar | 699.17 mi (1,125.21 km) |
| Harrow to Lluchmayor | 849.92 mi (1,367.81 km) |
| Harrow to Loeches | 787.44 mi (1,267.27 km) |
| Harrow to Logrono | 637.67 mi (1,026.23 km) |
| Harrow to Loja | 1,013.31 mi (1,630.76 km) |
| Harrow to Lora del Rio | 995.09 mi (1,601.45 km) |
| Harrow to Lorca | 962.90 mi (1,549.64 km) |
| Harrow to Los Alcazares | 956.56 mi (1,539.44 km) |
| Harrow to Los Barrios | 1,093.68 mi (1,760.11 km) |
| Harrow to Los Corrales de Buelna | 600.49 mi (966.39 km) |
