| Birstonas to Alfena | 1,744.04 mi (2,806.76 km) |
| Birstonas to Alijo | 1,702.51 mi (2,739.92 km) |
| Birstonas to Aljustrel | 1,894.48 mi (3,048.87 km) |
| Birstonas to Almada | 1,892.32 mi (3,045.40 km) |
| Birstonas to Almargem | 1,888.18 mi (3,038.73 km) |
| Birstonas to Almeirim | 1,846.26 mi (2,971.26 km) |
| Birstonas to Amadora | 1,892.46 mi (3,045.62 km) |
| Birstonas to Amarante | 1,725.30 mi (2,776.61 km) |
| Birstonas to Amares | 1,718.97 mi (2,766.42 km) |
| Birstonas to Amora | 1,893.55 mi (3,047.38 km) |
| Birstonas to Anadia | 1,778.97 mi (2,862.98 km) |
| Birstonas to Angra do Heroismo | 2,597.23 mi (4,179.83 km) |
| Birstonas to Ansiao | 1,804.07 mi (2,903.38 km) |
| Birstonas to Anta | 1,758.74 mi (2,830.42 km) |
| Birstonas to Arcos de Valdevez | 1,711.50 mi (2,754.39 km) |
