| Adelphi to Smolyan | 5,011.48 mi (8,065.20 km) |
| Adelphi to Sofia | 4,909.14 mi (7,900.50 km) |
| Adelphi to Sopot | 4,969.22 mi (7,997.19 km) |
| Adelphi to Sozopol | 5,097.99 mi (8,204.42 km) |
| Adelphi to Sredets | 5,080.83 mi (8,176.81 km) |
| Adelphi to Stamboliyski | 4,981.78 mi (8,017.40 km) |
| Adelphi to Stara Zagora | 5,014.80 mi (8,070.54 km) |
| Adelphi to Svilengrad | 5,065.24 mi (8,151.71 km) |
| Adelphi to Svishtov | 4,953.36 mi (7,971.67 km) |
| Adelphi to Targovishte | 5,017.95 mi (8,075.60 km) |
| Adelphi to Teteven | 4,938.56 mi (7,947.85 km) |
| Adelphi to Troyan | 4,958.22 mi (7,979.48 km) |
| Adelphi to Tryavna | 4,990.59 mi (8,031.58 km) |
| Adelphi to Tutrakan | 4,985.56 mi (8,023.49 km) |
| Adelphi to Varna | 5,072.23 mi (8,162.97 km) |
