| Kirksville to Smolyan | 5,555.92 mi (8,941.39 km) |
| Kirksville to Sofia | 5,451.66 mi (8,773.60 km) |
| Kirksville to Sopot | 5,504.28 mi (8,858.28 km) |
| Kirksville to Sozopol | 5,618.04 mi (9,041.36 km) |
| Kirksville to Sredets | 5,604.39 mi (9,019.39 km) |
| Kirksville to Stamboliyski | 5,522.48 mi (8,887.57 km) |
| Kirksville to Stara Zagora | 5,546.61 mi (8,926.41 km) |
| Kirksville to Svilengrad | 5,599.55 mi (9,011.61 km) |
| Kirksville to Svishtov | 5,476.65 mi (8,813.82 km) |
| Kirksville to Targovishte | 5,537.38 mi (8,911.55 km) |
| Kirksville to Teteven | 5,474.02 mi (8,809.58 km) |
| Kirksville to Troyan | 5,491.45 mi (8,837.63 km) |
| Kirksville to Tryavna | 5,519.54 mi (8,882.84 km) |
| Kirksville to Tutrakan | 5,497.86 mi (8,847.95 km) |
| Kirksville to Varna | 5,584.18 mi (8,986.87 km) |
