| Portsmouth to Acqui Terme | 612.69 mi (986.02 km) |
| Portsmouth to Acri | 1,150.01 mi (1,850.76 km) |
| Portsmouth to Adelfia | 1,092.43 mi (1,758.10 km) |
| Portsmouth to Adrano | 1,197.01 mi (1,926.40 km) |
| Portsmouth to Adria | 725.07 mi (1,166.89 km) |
| Portsmouth to Afragola | 1,004.38 mi (1,616.40 km) |
| Portsmouth to Agliana | 738.50 mi (1,188.51 km) |
| Portsmouth to Agrate Brianza | 600.15 mi (965.84 km) |
| Portsmouth to Agrigento | 1,178.31 mi (1,896.31 km) |
| Portsmouth to Agropoli | 1,056.87 mi (1,700.87 km) |
| Portsmouth to Ala | 655.25 mi (1,054.52 km) |
| Portsmouth to Alassio | 638.11 mi (1,026.93 km) |
| Portsmouth to Alatri | 929.03 mi (1,495.12 km) |
| Portsmouth to Alba | 597.06 mi (960.88 km) |
| Portsmouth to Albano Laziale | 905.28 mi (1,456.90 km) |
