| Doorn to Smolyan | 1,159.39 mi (1,865.86 km) |
| Doorn to Sofia | 1,055.26 mi (1,698.27 km) |
| Doorn to Sopot | 1,110.26 mi (1,786.80 km) |
| Doorn to Sozopol | 1,233.75 mi (1,985.52 km) |
| Doorn to Sredets | 1,217.36 mi (1,959.15 km) |
| Doorn to Stamboliyski | 1,126.63 mi (1,813.14 km) |
| Doorn to Stara Zagora | 1,154.25 mi (1,857.59 km) |
| Doorn to Svilengrad | 1,206.18 mi (1,941.16 km) |
| Doorn to Svishtov | 1,089.47 mi (1,753.33 km) |
| Doorn to Targovishte | 1,153.43 mi (1,856.27 km) |
| Doorn to Teteven | 1,079.74 mi (1,737.67 km) |
| Doorn to Troyan | 1,098.20 mi (1,767.38 km) |
| Doorn to Tryavna | 1,128.67 mi (1,816.41 km) |
| Doorn to Tutrakan | 1,120.67 mi (1,803.54 km) |
| Doorn to Varna | 1,207.30 mi (1,942.96 km) |
