| Burnham to Smolyan | 1,377.06 mi (2,216.17 km) |
| Burnham to Sofia | 1,274.32 mi (2,050.83 km) |
| Burnham to Sopot | 1,334.32 mi (2,147.39 km) |
| Burnham to Sozopol | 1,465.70 mi (2,358.82 km) |
| Burnham to Sredets | 1,447.58 mi (2,329.66 km) |
| Burnham to Stamboliyski | 1,346.88 mi (2,167.60 km) |
| Burnham to Stara Zagora | 1,380.14 mi (2,221.12 km) |
| Burnham to Svilengrad | 1,430.30 mi (2,301.84 km) |
| Burnham to Svishtov | 1,320.91 mi (2,125.80 km) |
| Burnham to Targovishte | 1,386.43 mi (2,231.25 km) |
| Burnham to Teteven | 1,303.66 mi (2,098.05 km) |
| Burnham to Troyan | 1,323.50 mi (2,129.96 km) |
| Burnham to Tryavna | 1,356.45 mi (2,182.99 km) |
| Burnham to Tutrakan | 1,357.74 mi (2,185.07 km) |
| Burnham to Varna | 1,443.56 mi (2,323.19 km) |
