| Niagara Falls to Arcore | 4,130.70 mi (6,647.72 km) |
| Niagara Falls to Ardea | 4,420.00 mi (7,113.31 km) |
| Niagara Falls to Arenzano | 4,150.14 mi (6,679.00 km) |
| Niagara Falls to Arese | 4,123.56 mi (6,636.24 km) |
| Niagara Falls to Arezzo | 4,318.61 mi (6,950.12 km) |
| Niagara Falls to Argelato | 4,253.61 mi (6,845.52 km) |
| Niagara Falls to Argenta | 4,271.86 mi (6,874.90 km) |
| Niagara Falls to Ariano Irpino | 4,545.02 mi (7,314.50 km) |
| Niagara Falls to Ariccia | 4,420.87 mi (7,114.70 km) |
| Niagara Falls to Arluno | 4,119.95 mi (6,630.41 km) |
| Niagara Falls to Arona | 4,095.24 mi (6,590.65 km) |
| Niagara Falls to Artena | 4,430.66 mi (7,130.46 km) |
| Niagara Falls to Arzachena | 4,306.76 mi (6,931.06 km) |
| Niagara Falls to Arzano | 4,520.51 mi (7,275.06 km) |
| Niagara Falls to Arzignano | 4,216.97 mi (6,786.56 km) |
