| Middleton to Smolyan | 1,487.68 mi (2,394.18 km) |
| Middleton to Sofia | 1,383.84 mi (2,227.07 km) |
| Middleton to Sopot | 1,440.35 mi (2,318.01 km) |
| Middleton to Sozopol | 1,565.33 mi (2,519.15 km) |
| Middleton to Sredets | 1,548.73 mi (2,492.44 km) |
| Middleton to Stamboliyski | 1,455.69 mi (2,342.70 km) |
| Middleton to Stara Zagora | 1,484.81 mi (2,389.56 km) |
| Middleton to Svilengrad | 1,536.37 mi (2,472.55 km) |
| Middleton to Svishtov | 1,420.93 mi (2,286.77 km) |
| Middleton to Targovishte | 1,485.08 mi (2,390.01 km) |
| Middleton to Teteven | 1,409.75 mi (2,268.78 km) |
| Middleton to Troyan | 1,428.57 mi (2,299.05 km) |
| Middleton to Tryavna | 1,459.58 mi (2,348.97 km) |
| Middleton to Tutrakan | 1,452.45 mi (2,337.49 km) |
| Middleton to Varna | 1,539.09 mi (2,476.92 km) |
