| Flower Mound to Smolyan | 6,094.71 mi (9,808.49 km) |
| Flower Mound to Sofia | 5,990.62 mi (9,640.97 km) |
| Flower Mound to Sopot | 6,044.84 mi (9,728.23 km) |
| Flower Mound to Sozopol | 6,161.57 mi (9,916.09 km) |
| Flower Mound to Sredets | 6,147.28 mi (9,893.10 km) |
| Flower Mound to Stamboliyski | 6,061.97 mi (9,755.79 km) |
| Flower Mound to Stara Zagora | 6,087.88 mi (9,797.50 km) |
| Flower Mound to Svilengrad | 6,140.46 mi (9,882.11 km) |
| Flower Mound to Svishtov | 6,019.33 mi (9,687.17 km) |
| Flower Mound to Targovishte | 6,080.85 mi (9,786.19 km) |
| Flower Mound to Teteven | 6,014.44 mi (9,679.30 km) |
| Flower Mound to Troyan | 6,032.33 mi (9,708.10 km) |
| Flower Mound to Tryavna | 6,061.28 mi (9,754.69 km) |
| Flower Mound to Tutrakan | 6,042.43 mi (9,724.35 km) |
| Flower Mound to Varna | 6,128.98 mi (9,863.64 km) |
