| Diamond Bar to Arcore | 6,021.18 mi (9,690.15 km) |
| Diamond Bar to Ardea | 6,337.36 mi (10,199.00 km) |
| Diamond Bar to Arenzano | 6,064.01 mi (9,759.08 km) |
| Diamond Bar to Arese | 6,017.48 mi (9,684.19 km) |
| Diamond Bar to Arezzo | 6,217.08 mi (10,005.43 km) |
| Diamond Bar to Argelato | 6,141.19 mi (9,883.29 km) |
| Diamond Bar to Argenta | 6,154.37 mi (9,904.51 km) |
| Diamond Bar to Ariano Irpino | 6,444.13 mi (10,370.82 km) |
| Diamond Bar to Ariccia | 6,335.81 mi (10,196.50 km) |
| Diamond Bar to Arluno | 6,015.77 mi (9,681.44 km) |
| Diamond Bar to Arona | 5,990.51 mi (9,640.79 km) |
| Diamond Bar to Artena | 6,343.04 mi (10,208.13 km) |
| Diamond Bar to Arzachena | 6,259.32 mi (10,073.41 km) |
| Diamond Bar to Arzano | 6,430.79 mi (10,349.36 km) |
| Diamond Bar to Arzignano | 6,090.93 mi (9,802.40 km) |
