| Rock Springs to Smolyan | 6,010.16 mi (9,672.42 km) |
| Rock Springs to Sofia | 5,907.20 mi (9,506.72 km) |
| Rock Springs to Sopot | 5,949.49 mi (9,574.77 km) |
| Rock Springs to Sozopol | 6,042.12 mi (9,723.86 km) |
| Rock Springs to Sredets | 6,032.97 mi (9,709.12 km) |
| Rock Springs to Stamboliyski | 5,973.55 mi (9,613.50 km) |
| Rock Springs to Stara Zagora | 5,986.66 mi (9,634.59 km) |
| Rock Springs to Svilengrad | 6,040.66 mi (9,721.50 km) |
| Rock Springs to Svishtov | 5,909.38 mi (9,510.23 km) |
| Rock Springs to Targovishte | 5,963.59 mi (9,597.47 km) |
| Rock Springs to Teteven | 5,920.72 mi (9,528.48 km) |
| Rock Springs to Troyan | 5,935.01 mi (9,551.47 km) |
| Rock Springs to Tryavna | 5,957.23 mi (9,587.24 km) |
| Rock Springs to Tutrakan | 5,917.33 mi (9,523.03 km) |
| Rock Springs to Varna | 6,000.20 mi (9,656.38 km) |
