| Adra to Popovo | 1,603.53 mi (2,580.64 km) |
| Adra to Provadia | 1,662.42 mi (2,675.41 km) |
| Adra to Radnevo | 1,581.52 mi (2,545.22 km) |
| Adra to Radomir | 1,431.97 mi (2,304.53 km) |
| Adra to Rakitovo | 1,485.27 mi (2,390.31 km) |
| Adra to Rakovski | 1,532.16 mi (2,465.78 km) |
| Adra to Razgrad | 1,619.11 mi (2,605.71 km) |
| Adra to Razlog | 1,453.08 mi (2,338.51 km) |
| Adra to Ruse | 1,593.76 mi (2,564.91 km) |
| Adra to Samokov | 1,460.82 mi (2,350.96 km) |
| Adra to Sandanski | 1,441.71 mi (2,320.21 km) |
| Adra to Sevlievo | 1,544.89 mi (2,486.27 km) |
| Adra to Shumen | 1,638.02 mi (2,636.15 km) |
| Adra to Silistra | 1,660.86 mi (2,672.90 km) |
| Adra to Sliven | 1,603.97 mi (2,581.34 km) |
