| Rocky River to Smolyan | 5,095.53 mi (8,200.46 km) |
| Rocky River to Sofia | 4,991.93 mi (8,033.73 km) |
| Rocky River to Sopot | 5,048.65 mi (8,125.01 km) |
| Rocky River to Sozopol | 5,170.78 mi (8,321.57 km) |
| Rocky River to Sredets | 5,155.21 mi (8,296.51 km) |
| Rocky River to Stamboliyski | 5,063.94 mi (8,149.62 km) |
| Rocky River to Stara Zagora | 5,092.84 mi (8,196.14 km) |
| Rocky River to Svilengrad | 5,144.64 mi (8,279.50 km) |
| Rocky River to Svishtov | 5,027.16 mi (8,090.44 km) |
| Rocky River to Targovishte | 5,090.17 mi (8,191.83 km) |
| Rocky River to Teteven | 5,018.07 mi (8,075.80 km) |
| Rocky River to Troyan | 5,036.74 mi (8,105.84 km) |
| Rocky River to Tryavna | 5,067.19 mi (8,154.86 km) |
| Rocky River to Tutrakan | 5,054.33 mi (8,134.15 km) |
| Rocky River to Varna | 5,141.15 mi (8,273.89 km) |
