| Westlake to Smolyan | 5,099.32 mi (8,206.57 km) |
| Westlake to Sofia | 4,995.71 mi (8,039.82 km) |
| Westlake to Sopot | 5,052.41 mi (8,131.07 km) |
| Westlake to Sozopol | 5,174.51 mi (8,327.56 km) |
| Westlake to Sredets | 5,158.94 mi (8,302.52 km) |
| Westlake to Stamboliyski | 5,067.72 mi (8,155.71 km) |
| Westlake to Stara Zagora | 5,096.60 mi (8,202.18 km) |
| Westlake to Svilengrad | 5,148.40 mi (8,285.56 km) |
| Westlake to Svishtov | 5,030.89 mi (8,096.44 km) |
| Westlake to Targovishte | 5,093.89 mi (8,197.82 km) |
| Westlake to Teteven | 5,021.84 mi (8,081.86 km) |
| Westlake to Troyan | 5,040.50 mi (8,111.89 km) |
| Westlake to Tryavna | 5,070.94 mi (8,160.89 km) |
| Westlake to Tutrakan | 5,058.03 mi (8,140.10 km) |
| Westlake to Varna | 5,144.85 mi (8,279.84 km) |
