| Felton to Smolyan | 1,454.35 mi (2,340.54 km) |
| Felton to Sofia | 1,352.00 mi (2,175.84 km) |
| Felton to Sopot | 1,412.78 mi (2,273.66 km) |
| Felton to Sozopol | 1,545.35 mi (2,487.00 km) |
| Felton to Sredets | 1,526.97 mi (2,457.42 km) |
| Felton to Stamboliyski | 1,424.67 mi (2,292.78 km) |
| Felton to Stara Zagora | 1,458.86 mi (2,347.81 km) |
| Felton to Svilengrad | 1,508.66 mi (2,427.96 km) |
| Felton to Svishtov | 1,400.60 mi (2,254.04 km) |
| Felton to Targovishte | 1,466.31 mi (2,359.80 km) |
| Felton to Teteven | 1,382.14 mi (2,224.34 km) |
| Felton to Troyan | 1,402.18 mi (2,256.59 km) |
| Felton to Tryavna | 1,435.51 mi (2,310.23 km) |
| Felton to Tutrakan | 1,438.25 mi (2,314.64 km) |
| Felton to Varna | 1,523.90 mi (2,452.48 km) |
