| Bideford to Smolyan | 1,513.09 mi (2,435.09 km) |
| Bideford to Sofia | 1,411.56 mi (2,271.68 km) |
| Bideford to Sopot | 1,473.72 mi (2,371.72 km) |
| Bideford to Sozopol | 1,608.58 mi (2,588.75 km) |
| Bideford to Sredets | 1,589.64 mi (2,558.28 km) |
| Bideford to Stamboliyski | 1,484.34 mi (2,388.81 km) |
| Bideford to Stara Zagora | 1,520.25 mi (2,446.61 km) |
| Bideford to Svilengrad | 1,569.33 mi (2,525.60 km) |
| Bideford to Svishtov | 1,464.00 mi (2,356.08 km) |
| Bideford to Targovishte | 1,530.08 mi (2,462.42 km) |
| Bideford to Teteven | 1,443.13 mi (2,322.50 km) |
| Bideford to Troyan | 1,463.55 mi (2,355.36 km) |
| Bideford to Tryavna | 1,497.60 mi (2,410.15 km) |
| Bideford to Tutrakan | 1,503.50 mi (2,419.65 km) |
| Bideford to Varna | 1,588.69 mi (2,556.75 km) |
