| Grantham to Smolyan | 1,411.47 mi (2,271.55 km) |
| Grantham to Sofia | 1,307.75 mi (2,104.63 km) |
| Grantham to Sopot | 1,364.83 mi (2,196.48 km) |
| Grantham to Sozopol | 1,491.02 mi (2,399.56 km) |
| Grantham to Sredets | 1,474.12 mi (2,372.37 km) |
| Grantham to Stamboliyski | 1,379.74 mi (2,220.47 km) |
| Grantham to Stara Zagora | 1,409.54 mi (2,268.43 km) |
| Grantham to Svilengrad | 1,460.89 mi (2,351.07 km) |
| Grantham to Svishtov | 1,346.47 mi (2,166.93 km) |
| Grantham to Targovishte | 1,410.92 mi (2,270.66 km) |
| Grantham to Teteven | 1,334.21 mi (2,147.20 km) |
| Grantham to Troyan | 1,353.20 mi (2,177.77 km) |
| Grantham to Tryavna | 1,384.57 mi (2,228.25 km) |
| Grantham to Tutrakan | 1,379.07 mi (2,219.40 km) |
| Grantham to Varna | 1,465.59 mi (2,358.64 km) |
