| Harrow Weald to Arcore | 602.97 mi (970.39 km) |
| Harrow Weald to Ardea | 919.49 mi (1,479.78 km) |
| Harrow Weald to Arenzano | 648.11 mi (1,043.04 km) |
| Harrow Weald to Arese | 598.97 mi (963.95 km) |
| Harrow Weald to Arezzo | 798.75 mi (1,285.47 km) |
| Harrow Weald to Argelato | 724.21 mi (1,165.51 km) |
| Harrow Weald to Argenta | 738.92 mi (1,189.18 km) |
| Harrow Weald to Ariano Irpino | 1,026.68 mi (1,652.29 km) |
| Harrow Weald to Ariccia | 917.64 mi (1,476.79 km) |
| Harrow Weald to Arluno | 597.21 mi (961.12 km) |
| Harrow Weald to Arona | 571.96 mi (920.48 km) |
| Harrow Weald to Artena | 924.62 mi (1,488.03 km) |
| Harrow Weald to Arzachena | 860.56 mi (1,384.94 km) |
| Harrow Weald to Arzano | 1,012.25 mi (1,629.05 km) |
| Harrow Weald to Arzignano | 678.18 mi (1,091.43 km) |
