| Wood River to Smolyan | 5,532.63 mi (8,903.91 km) |
| Wood River to Sofia | 5,428.59 mi (8,736.47 km) |
| Wood River to Sopot | 5,483.20 mi (8,824.36 km) |
| Wood River to Sozopol | 5,600.96 mi (9,013.88 km) |
| Wood River to Sredets | 5,586.42 mi (8,990.47 km) |
| Wood River to Stamboliyski | 5,500.05 mi (8,851.47 km) |
| Wood River to Stara Zagora | 5,526.45 mi (8,893.96 km) |
| Wood River to Svilengrad | 5,578.91 mi (8,978.38 km) |
| Wood River to Svishtov | 5,458.41 mi (8,784.46 km) |
| Wood River to Targovishte | 5,520.24 mi (8,883.97 km) |
| Wood River to Teteven | 5,452.76 mi (8,775.38 km) |
| Wood River to Troyan | 5,470.79 mi (8,804.39 km) |
| Wood River to Tryavna | 5,500.01 mi (8,851.42 km) |
| Wood River to Tutrakan | 5,482.35 mi (8,822.99 km) |
| Wood River to Varna | 5,568.99 mi (8,962.42 km) |
