| Callaway to Smolyan | 5,785.11 mi (9,310.23 km) |
| Callaway to Sofia | 5,683.44 mi (9,146.61 km) |
| Callaway to Sopot | 5,744.66 mi (9,245.13 km) |
| Callaway to Sozopol | 5,875.43 mi (9,455.59 km) |
| Callaway to Sredets | 5,857.80 mi (9,427.22 km) |
| Callaway to Stamboliyski | 5,756.19 mi (9,263.69 km) |
| Callaway to Stara Zagora | 5,790.65 mi (9,319.15 km) |
| Callaway to Svilengrad | 5,840.53 mi (9,399.43 km) |
| Callaway to Svishtov | 5,730.67 mi (9,222.63 km) |
| Callaway to Targovishte | 5,795.65 mi (9,327.20 km) |
| Callaway to Teteven | 5,714.01 mi (9,195.81 km) |
| Callaway to Troyan | 5,733.99 mi (9,227.96 km) |
| Callaway to Tryavna | 5,766.96 mi (9,281.03 km) |
| Callaway to Tutrakan | 5,764.27 mi (9,276.70 km) |
| Callaway to Varna | 5,850.81 mi (9,415.96 km) |
