| Watauga to Smolyan | 6,108.42 mi (9,830.55 km) |
| Watauga to Sofia | 6,004.33 mi (9,663.03 km) |
| Watauga to Sopot | 6,058.56 mi (9,750.31 km) |
| Watauga to Sozopol | 6,175.31 mi (9,938.19 km) |
| Watauga to Sredets | 6,161.02 mi (9,915.20 km) |
| Watauga to Stamboliyski | 6,075.68 mi (9,777.86 km) |
| Watauga to Stara Zagora | 6,101.61 mi (9,819.59 km) |
| Watauga to Svilengrad | 6,154.18 mi (9,904.20 km) |
| Watauga to Svishtov | 6,033.06 mi (9,709.27 km) |
| Watauga to Targovishte | 6,094.59 mi (9,808.29 km) |
| Watauga to Teteven | 6,028.15 mi (9,701.38 km) |
| Watauga to Troyan | 6,046.05 mi (9,730.18 km) |
| Watauga to Tryavna | 6,075.01 mi (9,776.79 km) |
| Watauga to Tutrakan | 6,056.17 mi (9,746.46 km) |
| Watauga to Varna | 6,142.72 mi (9,885.75 km) |
