| Appenzell to Smolyan | 849.95 mi (1,367.86 km) |
| Appenzell to Sofia | 749.76 mi (1,206.62 km) |
| Appenzell to Sopot | 814.33 mi (1,310.54 km) |
| Appenzell to Sozopol | 954.69 mi (1,536.43 km) |
| Appenzell to Sredets | 934.16 mi (1,503.38 km) |
| Appenzell to Stamboliyski | 822.52 mi (1,323.71 km) |
| Appenzell to Stara Zagora | 861.71 mi (1,386.79 km) |
| Appenzell to Svilengrad | 909.03 mi (1,462.94 km) |
| Appenzell to Svishtov | 811.82 mi (1,306.50 km) |
| Appenzell to Targovishte | 878.64 mi (1,414.04 km) |
| Appenzell to Teteven | 784.01 mi (1,261.75 km) |
| Appenzell to Troyan | 805.23 mi (1,295.89 km) |
| Appenzell to Tryavna | 840.97 mi (1,353.41 km) |
| Appenzell to Tutrakan | 858.56 mi (1,381.72 km) |
| Appenzell to Varna | 940.75 mi (1,514.00 km) |
