| Grand Rapids to Smolyan | 5,169.31 mi (8,319.20 km) |
| Grand Rapids to Sofia | 5,065.20 mi (8,151.65 km) |
| Grand Rapids to Sopot | 5,119.38 mi (8,238.85 km) |
| Grand Rapids to Sozopol | 5,236.46 mi (8,427.27 km) |
| Grand Rapids to Sredets | 5,222.05 mi (8,404.07 km) |
| Grand Rapids to Stamboliyski | 5,136.52 mi (8,266.43 km) |
| Grand Rapids to Stara Zagora | 5,162.46 mi (8,308.17 km) |
| Grand Rapids to Svilengrad | 5,215.01 mi (8,392.75 km) |
| Grand Rapids to Svishtov | 5,094.07 mi (8,198.11 km) |
| Grand Rapids to Targovishte | 5,155.74 mi (8,297.36 km) |
| Grand Rapids to Teteven | 5,088.98 mi (8,189.92 km) |
| Grand Rapids to Troyan | 5,106.89 mi (8,218.74 km) |
| Grand Rapids to Tryavna | 5,135.90 mi (8,265.43 km) |
| Grand Rapids to Tutrakan | 5,117.62 mi (8,236.02 km) |
| Grand Rapids to Varna | 5,204.23 mi (8,375.40 km) |
