| Kirkwood to Smolyan | 5,559.61 mi (8,947.32 km) |
| Kirkwood to Sofia | 5,455.56 mi (8,779.88 km) |
| Kirkwood to Sopot | 5,510.17 mi (8,867.77 km) |
| Kirkwood to Sozopol | 5,627.92 mi (9,057.26 km) |
| Kirkwood to Sredets | 5,613.38 mi (9,033.86 km) |
| Kirkwood to Stamboliyski | 5,527.02 mi (8,894.88 km) |
| Kirkwood to Stara Zagora | 5,553.42 mi (8,937.36 km) |
| Kirkwood to Svilengrad | 5,605.88 mi (9,021.79 km) |
| Kirkwood to Svishtov | 5,485.37 mi (8,827.85 km) |
| Kirkwood to Targovishte | 5,547.20 mi (8,927.35 km) |
| Kirkwood to Teteven | 5,479.74 mi (8,818.78 km) |
| Kirkwood to Troyan | 5,497.76 mi (8,847.79 km) |
| Kirkwood to Tryavna | 5,526.98 mi (8,894.82 km) |
| Kirkwood to Tutrakan | 5,509.29 mi (8,866.35 km) |
| Kirkwood to Varna | 5,595.93 mi (9,005.79 km) |
