| Harrow to Acqui Terme | 626.02 mi (1,007.48 km) |
| Harrow to Acri | 1,157.62 mi (1,863.01 km) |
| Harrow to Adelfia | 1,095.07 mi (1,762.35 km) |
| Harrow to Adrano | 1,212.19 mi (1,950.84 km) |
| Harrow to Adria | 725.14 mi (1,167.00 km) |
| Harrow to Afragola | 1,013.18 mi (1,630.56 km) |
| Harrow to Agliana | 746.55 mi (1,201.46 km) |
| Harrow to Agrate Brianza | 605.94 mi (975.17 km) |
| Harrow to Agrigento | 1,197.11 mi (1,926.57 km) |
| Harrow to Agropoli | 1,065.57 mi (1,714.87 km) |
| Harrow to Ala | 654.91 mi (1,053.98 km) |
| Harrow to Alassio | 655.35 mi (1,054.69 km) |
| Harrow to Alatri | 937.97 mi (1,509.52 km) |
| Harrow to Alba | 611.94 mi (984.82 km) |
| Harrow to Albano Laziale | 916.00 mi (1,474.16 km) |
