| Dumbarton to Amelia | 1,194.96 mi (1,923.11 km) |
| Dumbarton to Anagni | 1,262.47 mi (2,031.74 km) |
| Dumbarton to Ancona | 1,166.50 mi (1,877.30 km) |
| Dumbarton to Andria | 1,384.15 mi (2,227.57 km) |
| Dumbarton to Angri | 1,360.77 mi (2,189.95 km) |
| Dumbarton to Anguillara Sabazia | 1,217.88 mi (1,960.00 km) |
| Dumbarton to Anzio | 1,265.02 mi (2,035.85 km) |
| Dumbarton to Anzola dell'Emilia | 1,046.59 mi (1,684.32 km) |
| Dumbarton to Aosta | 873.27 mi (1,405.39 km) |
| Dumbarton to Apricena | 1,327.14 mi (2,135.82 km) |
| Dumbarton to Aprilia | 1,257.63 mi (2,023.96 km) |
| Dumbarton to Aradeo | 1,500.97 mi (2,415.58 km) |
| Dumbarton to Aragona | 1,534.18 mi (2,469.02 km) |
| Dumbarton to Arco | 961.82 mi (1,547.90 km) |
| Dumbarton to Arcola | 1,035.22 mi (1,666.03 km) |
