| Smiltene to Smolyan | 1,096.41 mi (1,764.50 km) |
| Smiltene to Sofia | 1,024.15 mi (1,648.21 km) |
| Smiltene to Sopot | 1,022.66 mi (1,645.82 km) |
| Smiltene to Sozopol | 1,040.54 mi (1,674.58 km) |
| Smiltene to Sredets | 1,043.71 mi (1,679.69 km) |
| Smiltene to Stamboliyski | 1,058.83 mi (1,704.02 km) |
| Smiltene to Stara Zagora | 1,036.46 mi (1,668.02 km) |
| Smiltene to Svilengrad | 1,082.54 mi (1,742.18 km) |
| Smiltene to Svishtov | 954.93 mi (1,536.81 km) |
| Smiltene to Targovishte | 980.42 mi (1,577.84 km) |
| Smiltene to Teteven | 1,005.53 mi (1,618.24 km) |
| Smiltene to Troyan | 1,006.63 mi (1,620.02 km) |
| Smiltene to Tryavna | 1,006.59 mi (1,619.95 km) |
| Smiltene to Tutrakan | 925.21 mi (1,488.99 km) |
| Smiltene to Varna | 986.18 mi (1,587.10 km) |
