| Weirton to Smolyan | 5,093.95 mi (8,197.93 km) |
| Weirton to Sofia | 4,990.70 mi (8,031.76 km) |
| Weirton to Sopot | 5,048.58 mi (8,124.91 km) |
| Weirton to Sozopol | 5,173.00 mi (8,325.14 km) |
| Weirton to Sredets | 5,156.89 mi (8,299.22 km) |
| Weirton to Stamboliyski | 5,062.97 mi (8,148.06 km) |
| Weirton to Stara Zagora | 5,093.26 mi (8,196.82 km) |
| Weirton to Svilengrad | 5,144.65 mi (8,279.51 km) |
| Weirton to Svishtov | 5,028.94 mi (8,093.30 km) |
| Weirton to Targovishte | 5,092.51 mi (8,195.61 km) |
| Weirton to Teteven | 5,017.95 mi (8,075.62 km) |
| Weirton to Troyan | 5,036.96 mi (8,106.21 km) |
| Weirton to Tryavna | 5,068.08 mi (8,156.28 km) |
| Weirton to Tutrakan | 5,057.79 mi (8,139.73 km) |
| Weirton to Varna | 5,144.63 mi (8,279.48 km) |
