| Diamond Bar to Amelia | 6,283.09 mi (10,111.66 km) |
| Diamond Bar to Anagni | 6,350.37 mi (10,219.94 km) |
| Diamond Bar to Ancona | 6,260.56 mi (10,075.40 km) |
| Diamond Bar to Andria | 6,478.54 mi (10,426.20 km) |
| Diamond Bar to Angri | 6,450.43 mi (10,380.96 km) |
| Diamond Bar to Anguillara Sabazia | 6,303.18 mi (10,143.99 km) |
| Diamond Bar to Anzio | 6,349.00 mi (10,217.73 km) |
| Diamond Bar to Anzola dell'Emilia | 6,137.86 mi (9,877.93 km) |
| Diamond Bar to Aosta | 5,951.30 mi (9,577.70 km) |
| Diamond Bar to Apricena | 6,421.22 mi (10,333.95 km) |
| Diamond Bar to Aprilia | 6,342.42 mi (10,207.13 km) |
| Diamond Bar to Aradeo | 6,595.56 mi (10,614.53 km) |
| Diamond Bar to Aragona | 6,599.75 mi (10,621.26 km) |
| Diamond Bar to Arco | 6,055.81 mi (9,745.88 km) |
| Diamond Bar to Arcola | 6,118.82 mi (9,847.29 km) |
