| Frederickson to Smolyan | 5,985.72 mi (9,633.09 km) |
| Frederickson to Sofia | 5,887.76 mi (9,475.44 km) |
| Frederickson to Sopot | 5,918.23 mi (9,524.46 km) |
| Frederickson to Sozopol | 5,986.70 mi (9,634.67 km) |
| Frederickson to Sredets | 5,982.28 mi (9,627.55 km) |
| Frederickson to Stamboliyski | 5,947.26 mi (9,571.19 km) |
| Frederickson to Stara Zagora | 5,948.93 mi (9,573.88 km) |
| Frederickson to Svilengrad | 6,002.04 mi (9,659.35 km) |
| Frederickson to Svishtov | 5,867.25 mi (9,442.43 km) |
| Frederickson to Targovishte | 5,913.10 mi (9,516.21 km) |
| Frederickson to Teteven | 5,891.98 mi (9,482.23 km) |
| Frederickson to Troyan | 5,902.63 mi (9,499.37 km) |
| Frederickson to Tryavna | 5,918.25 mi (9,524.50 km) |
| Frederickson to Tutrakan | 5,861.95 mi (9,433.90 km) |
| Frederickson to Varna | 5,938.44 mi (9,556.99 km) |
