| Romeoville to Arcore | 4,557.02 mi (7,333.81 km) |
| Romeoville to Ardea | 4,853.65 mi (7,811.20 km) |
| Romeoville to Arenzano | 4,581.49 mi (7,373.20 km) |
| Romeoville to Arese | 4,550.56 mi (7,323.41 km) |
| Romeoville to Arezzo | 4,747.80 mi (7,640.84 km) |
| Romeoville to Argelato | 4,680.12 mi (7,531.93 km) |
| Romeoville to Argenta | 4,697.44 mi (7,559.80 km) |
| Romeoville to Ariano Irpino | 4,975.71 mi (8,007.62 km) |
| Romeoville to Ariccia | 4,854.03 mi (7,811.81 km) |
| Romeoville to Arluno | 4,547.32 mi (7,318.20 km) |
| Romeoville to Arona | 4,522.33 mi (7,277.99 km) |
| Romeoville to Artena | 4,863.36 mi (7,826.82 km) |
| Romeoville to Arzachena | 4,746.90 mi (7,639.40 km) |
| Romeoville to Arzano | 4,953.30 mi (7,971.57 km) |
| Romeoville to Arzignano | 4,640.38 mi (7,467.97 km) |
