| South Euclid to Smolyan | 5,080.37 mi (8,176.06 km) |
| South Euclid to Sofia | 4,976.79 mi (8,009.37 km) |
| South Euclid to Sopot | 5,033.62 mi (8,100.82 km) |
| South Euclid to Sozopol | 5,155.96 mi (8,297.71 km) |
| South Euclid to Sredets | 5,140.34 mi (8,272.58 km) |
| South Euclid to Stamboliyski | 5,048.83 mi (8,125.30 km) |
| South Euclid to Stara Zagora | 5,077.85 mi (8,172.02 km) |
| South Euclid to Svilengrad | 5,129.62 mi (8,255.32 km) |
| South Euclid to Svishtov | 5,012.29 mi (8,066.51 km) |
| South Euclid to Targovishte | 5,075.35 mi (8,167.99 km) |
| South Euclid to Teteven | 5,003.03 mi (8,051.60 km) |
| South Euclid to Troyan | 5,021.73 mi (8,081.69 km) |
| South Euclid to Tryavna | 5,052.24 mi (8,130.80 km) |
| South Euclid to Tutrakan | 5,039.61 mi (8,110.47 km) |
| South Euclid to Varna | 5,126.44 mi (8,250.21 km) |
