| Sliven to Alfena | 1,781.03 mi (2,866.28 km) |
| Sliven to Alijo | 1,727.61 mi (2,780.31 km) |
| Sliven to Aljustrel | 1,834.41 mi (2,952.20 km) |
| Sliven to Almada | 1,866.12 mi (3,003.24 km) |
| Sliven to Almargem | 1,867.94 mi (3,006.15 km) |
| Sliven to Almeirim | 1,826.72 mi (2,939.81 km) |
| Sliven to Amadora | 1,868.68 mi (3,007.34 km) |
| Sliven to Amarante | 1,757.49 mi (2,828.41 km) |
| Sliven to Amares | 1,764.83 mi (2,840.22 km) |
| Sliven to Amora | 1,865.40 mi (3,002.07 km) |
| Sliven to Anadia | 1,791.48 mi (2,883.11 km) |
| Sliven to Angra do Heroismo | 2,772.96 mi (4,462.65 km) |
| Sliven to Ansiao | 1,801.93 mi (2,899.93 km) |
| Sliven to Anta | 1,790.21 mi (2,881.07 km) |
| Sliven to Arcos de Valdevez | 1,765.27 mi (2,840.93 km) |
