| Storm Lake to Smolyan | 5,520.52 mi (8,884.43 km) |
| Storm Lake to Sofia | 5,416.26 mi (8,716.62 km) |
| Storm Lake to Sopot | 5,466.08 mi (8,796.80 km) |
| Storm Lake to Sozopol | 5,574.25 mi (8,970.89 km) |
| Storm Lake to Sredets | 5,561.82 mi (8,950.88 km) |
| Storm Lake to Stamboliyski | 5,486.04 mi (8,828.93 km) |
| Storm Lake to Stara Zagora | 5,507.09 mi (8,862.80 km) |
| Storm Lake to Svilengrad | 5,560.53 mi (8,948.81 km) |
| Storm Lake to Svishtov | 5,434.77 mi (8,746.42 km) |
| Storm Lake to Targovishte | 5,493.89 mi (8,841.56 km) |
| Storm Lake to Teteven | 5,436.13 mi (8,748.61 km) |
| Storm Lake to Troyan | 5,452.72 mi (8,775.31 km) |
| Storm Lake to Tryavna | 5,479.24 mi (8,817.98 km) |
| Storm Lake to Tutrakan | 5,452.31 mi (8,774.65 km) |
| Storm Lake to Varna | 5,538.00 mi (8,912.55 km) |
