| Harrow to Amelia | 863.85 mi (1,390.23 km) |
| Harrow to Anagni | 931.14 mi (1,498.52 km) |
| Harrow to Ancona | 846.13 mi (1,361.72 km) |
| Harrow to Andria | 1,064.16 mi (1,712.61 km) |
| Harrow to Angri | 1,031.23 mi (1,659.61 km) |
| Harrow to Anguillara Sabazia | 884.29 mi (1,423.12 km) |
| Harrow to Anzio | 930.54 mi (1,497.57 km) |
| Harrow to Anzola dell'Emilia | 719.84 mi (1,158.47 km) |
| Harrow to Aosta | 533.94 mi (859.29 km) |
| Harrow to Apricena | 1,005.89 mi (1,618.82 km) |
| Harrow to Aprilia | 923.71 mi (1,486.57 km) |
| Harrow to Aradeo | 1,184.08 mi (1,905.59 km) |
| Harrow to Aragona | 1,193.00 mi (1,919.94 km) |
| Harrow to Arco | 643.04 mi (1,034.88 km) |
| Harrow to Arcola | 700.04 mi (1,126.61 km) |
