| Madrid to Smolyan | 1,476.60 mi (2,376.37 km) |
| Madrid to Sofia | 1,400.48 mi (2,253.86 km) |
| Madrid to Sopot | 1,472.69 mi (2,370.07 km) |
| Madrid to Sozopol | 1,623.70 mi (2,613.09 km) |
| Madrid to Sredets | 1,598.77 mi (2,572.98 km) |
| Madrid to Stamboliyski | 1,464.34 mi (2,356.62 km) |
| Madrid to Stara Zagora | 1,519.48 mi (2,445.37 km) |
| Madrid to Svilengrad | 1,552.09 mi (2,497.84 km) |
| Madrid to Svishtov | 1,499.85 mi (2,413.78 km) |
| Madrid to Targovishte | 1,562.75 mi (2,515.00 km) |
| Madrid to Teteven | 1,447.20 mi (2,329.04 km) |
| Madrid to Troyan | 1,470.06 mi (2,365.83 km) |
| Madrid to Tryavna | 1,509.72 mi (2,429.66 km) |
| Madrid to Tutrakan | 1,562.20 mi (2,514.12 km) |
| Madrid to Varna | 1,629.88 mi (2,623.03 km) |
