| Sulphur Springs to Smolyan | 6,033.23 mi (9,709.55 km) |
| Sulphur Springs to Sofia | 5,929.25 mi (9,542.21 km) |
| Sulphur Springs to Sopot | 5,984.22 mi (9,630.67 km) |
| Sulphur Springs to Sozopol | 6,102.48 mi (9,820.98 km) |
| Sulphur Springs to Sredets | 6,087.84 mi (9,797.43 km) |
| Sulphur Springs to Stamboliyski | 6,000.82 mi (9,657.39 km) |
| Sulphur Springs to Stara Zagora | 6,027.60 mi (9,700.49 km) |
| Sulphur Springs to Svilengrad | 6,079.98 mi (9,784.78 km) |
| Sulphur Springs to Svishtov | 5,959.82 mi (9,591.40 km) |
| Sulphur Springs to Targovishte | 6,021.75 mi (9,691.08 km) |
| Sulphur Springs to Teteven | 5,953.76 mi (9,581.65 km) |
| Sulphur Springs to Troyan | 5,971.88 mi (9,610.81 km) |
| Sulphur Springs to Tryavna | 6,001.26 mi (9,658.10 km) |
| Sulphur Springs to Tutrakan | 5,983.99 mi (9,630.29 km) |
| Sulphur Springs to Varna | 6,070.64 mi (9,769.75 km) |
