| Ludwigsburg to Smolyan | 905.39 mi (1,457.08 km) |
| Ludwigsburg to Sofia | 802.53 mi (1,291.55 km) |
| Ludwigsburg to Sopot | 862.77 mi (1,388.50 km) |
| Ludwigsburg to Sozopol | 996.13 mi (1,603.12 km) |
| Ludwigsburg to Sredets | 977.37 mi (1,572.92 km) |
| Ludwigsburg to Stamboliyski | 875.08 mi (1,408.31 km) |
| Ludwigsburg to Stara Zagora | 908.84 mi (1,462.64 km) |
| Ludwigsburg to Svilengrad | 958.68 mi (1,542.85 km) |
| Ludwigsburg to Svishtov | 851.52 mi (1,370.40 km) |
| Ludwigsburg to Targovishte | 917.60 mi (1,476.73 km) |
| Ludwigsburg to Teteven | 832.13 mi (1,339.18 km) |
| Ludwigsburg to Troyan | 852.15 mi (1,371.41 km) |
| Ludwigsburg to Tryavna | 885.63 mi (1,425.28 km) |
| Ludwigsburg to Tutrakan | 891.66 mi (1,434.99 km) |
| Ludwigsburg to Varna | 976.49 mi (1,571.52 km) |
