| Niagara Falls to Ascoli Piceno | 4,413.27 mi (7,102.47 km) |
| Niagara Falls to Asola | 4,191.14 mi (6,744.98 km) |
| Niagara Falls to Asolo | 4,229.66 mi (6,806.99 km) |
| Niagara Falls to Assemini | 4,361.11 mi (7,018.53 km) |
| Niagara Falls to Assisi | 4,364.42 mi (7,023.86 km) |
| Niagara Falls to Asti | 4,112.12 mi (6,617.81 km) |
| Niagara Falls to Atessa | 4,480.83 mi (7,211.19 km) |
| Niagara Falls to Atri | 4,440.52 mi (7,146.32 km) |
| Niagara Falls to Atripalda | 4,543.87 mi (7,312.65 km) |
| Niagara Falls to Augusta | 4,715.31 mi (7,588.55 km) |
| Niagara Falls to Aulla | 4,210.52 mi (6,776.17 km) |
| Niagara Falls to Aurisina | 4,305.45 mi (6,928.95 km) |
| Niagara Falls to Avellino | 4,542.34 mi (7,310.18 km) |
| Niagara Falls to Aversa | 4,515.66 mi (7,267.25 km) |
| Niagara Falls to Avezzano | 4,440.01 mi (7,145.51 km) |
