| West Richland to Smolyan | 5,975.13 mi (9,616.05 km) |
| West Richland to Sofia | 5,875.89 mi (9,456.32 km) |
| West Richland to Sopot | 5,908.81 mi (9,509.31 km) |
| West Richland to Sozopol | 5,982.36 mi (9,627.67 km) |
| West Richland to Sredets | 5,976.97 mi (9,619.00 km) |
| West Richland to Stamboliyski | 5,936.93 mi (9,554.56 km) |
| West Richland to Stara Zagora | 5,940.91 mi (9,560.97 km) |
| West Richland to Svilengrad | 5,994.35 mi (9,646.97 km) |
| West Richland to Svishtov | 5,859.88 mi (9,430.56 km) |
| West Richland to Targovishte | 5,907.54 mi (9,507.27 km) |
| West Richland to Teteven | 5,881.98 mi (9,466.14 km) |
| West Richland to Troyan | 5,893.39 mi (9,484.50 km) |
| West Richland to Tryavna | 5,910.39 mi (9,511.85 km) |
| West Richland to Tutrakan | 5,857.24 mi (9,426.31 km) |
| West Richland to Varna | 5,935.23 mi (9,551.83 km) |
