| Alvin to Smolyan | 6,218.88 mi (10,008.32 km) |
| Alvin to Sofia | 6,115.39 mi (9,841.78 km) |
| Alvin to Sopot | 6,172.44 mi (9,933.59 km) |
| Alvin to Sozopol | 6,294.79 mi (10,130.48 km) |
| Alvin to Sredets | 6,279.22 mi (10,105.43 km) |
| Alvin to Stamboliyski | 6,187.50 mi (9,957.81 km) |
| Alvin to Stara Zagora | 6,216.73 mi (10,004.86 km) |
| Alvin to Svilengrad | 6,268.46 mi (10,088.11 km) |
| Alvin to Svishtov | 6,151.17 mi (9,899.35 km) |
| Alvin to Targovishte | 6,214.16 mi (10,000.73 km) |
| Alvin to Teteven | 6,141.85 mi (9,884.36 km) |
| Alvin to Troyan | 6,160.59 mi (9,914.51 km) |
| Alvin to Tryavna | 6,191.14 mi (9,963.68 km) |
| Alvin to Tutrakan | 6,178.21 mi (9,942.87 km) |
| Alvin to Varna | 6,265.03 mi (10,082.59 km) |
