| Grand Terrace to Smolyan | 6,683.13 mi (10,755.45 km) |
| Grand Terrace to Sofia | 6,580.71 mi (10,590.63 km) |
| Grand Terrace to Sopot | 6,621.17 mi (10,655.75 km) |
| Grand Terrace to Sozopol | 6,709.61 mi (10,798.07 km) |
| Grand Terrace to Sredets | 6,701.35 mi (10,784.78 km) |
| Grand Terrace to Stamboliyski | 6,646.13 mi (10,695.91 km) |
| Grand Terrace to Stara Zagora | 6,657.31 mi (10,713.91 km) |
| Grand Terrace to Svilengrad | 6,711.30 mi (10,800.79 km) |
| Grand Terrace to Svishtov | 6,579.04 mi (10,587.94 km) |
| Grand Terrace to Targovishte | 6,631.82 mi (10,672.88 km) |
| Grand Terrace to Teteven | 6,592.76 mi (10,610.02 km) |
| Grand Terrace to Troyan | 6,606.46 mi (10,632.07 km) |
| Grand Terrace to Tryavna | 6,627.59 mi (10,666.07 km) |
| Grand Terrace to Tutrakan | 6,584.47 mi (10,596.68 km) |
| Grand Terrace to Varna | 6,666.28 mi (10,728.34 km) |
