| Adra to Smolyan | 1,514.87 mi (2,437.95 km) |
| Adra to Sofia | 1,452.48 mi (2,337.54 km) |
| Adra to Sopot | 1,523.68 mi (2,452.13 km) |
| Adra to Sozopol | 1,672.06 mi (2,690.92 km) |
| Adra to Sredets | 1,646.32 mi (2,649.49 km) |
| Adra to Stamboliyski | 1,509.18 mi (2,428.79 km) |
| Adra to Stara Zagora | 1,567.85 mi (2,523.21 km) |
| Adra to Svilengrad | 1,592.87 mi (2,563.48 km) |
| Adra to Svishtov | 1,561.93 mi (2,513.68 km) |
| Adra to Targovishte | 1,620.27 mi (2,607.58 km) |
| Adra to Teteven | 1,501.50 mi (2,416.42 km) |
| Adra to Troyan | 1,523.82 mi (2,452.35 km) |
| Adra to Tryavna | 1,563.11 mi (2,515.58 km) |
| Adra to Tutrakan | 1,628.57 mi (2,620.93 km) |
| Adra to Varna | 1,686.88 mi (2,714.77 km) |
