| Os to Amelia | 1,255.84 mi (2,021.07 km) |
| Os to Anagni | 1,318.06 mi (2,121.22 km) |
| Os to Ancona | 1,195.61 mi (1,924.15 km) |
| Os to Andria | 1,391.99 mi (2,240.19 km) |
| Os to Angri | 1,401.87 mi (2,256.09 km) |
| Os to Anguillara Sabazia | 1,286.06 mi (2,069.72 km) |
| Os to Anzio | 1,332.71 mi (2,144.79 km) |
| Os to Anzola dell'Emilia | 1,108.88 mi (1,784.57 km) |
| Os to Aosta | 1,004.24 mi (1,616.16 km) |
| Os to Apricena | 1,343.48 mi (2,162.12 km) |
| Os to Aprilia | 1,323.69 mi (2,130.27 km) |
| Os to Aradeo | 1,491.02 mi (2,399.56 km) |
| Os to Aragona | 1,617.16 mi (2,602.56 km) |
| Os to Arco | 1,013.07 mi (1,630.38 km) |
| Os to Arcola | 1,128.16 mi (1,815.60 km) |
