| Calumet City to Smolyan | 5,303.67 mi (8,535.44 km) |
| Calumet City to Sofia | 5,199.56 mi (8,367.89 km) |
| Calumet City to Sopot | 5,253.73 mi (8,455.06 km) |
| Calumet City to Sozopol | 5,370.71 mi (8,643.32 km) |
| Calumet City to Sredets | 5,356.33 mi (8,620.18 km) |
| Calumet City to Stamboliyski | 5,270.88 mi (8,482.66 km) |
| Calumet City to Stara Zagora | 5,296.79 mi (8,524.36 km) |
| Calumet City to Svilengrad | 5,349.35 mi (8,608.95 km) |
| Calumet City to Svishtov | 5,228.35 mi (8,414.22 km) |
| Calumet City to Targovishte | 5,289.99 mi (8,513.41 km) |
| Calumet City to Teteven | 5,223.33 mi (8,406.13 km) |
| Calumet City to Troyan | 5,241.23 mi (8,434.94 km) |
| Calumet City to Tryavna | 5,270.22 mi (8,481.60 km) |
| Calumet City to Tutrakan | 5,251.81 mi (8,451.97 km) |
| Calumet City to Varna | 5,338.41 mi (8,591.34 km) |
