| Tucson to Smolyan | 6,611.20 mi (10,639.70 km) |
| Tucson to Sofia | 6,507.34 mi (10,472.55 km) |
| Tucson to Sopot | 6,553.48 mi (10,546.81 km) |
| Tucson to Sozopol | 6,653.58 mi (10,707.90 km) |
| Tucson to Sredets | 6,642.93 mi (10,690.76 km) |
| Tucson to Stamboliyski | 6,575.58 mi (10,582.37 km) |
| Tucson to Stara Zagora | 6,592.59 mi (10,609.74 km) |
| Tucson to Svilengrad | 6,646.45 mi (10,696.42 km) |
| Tucson to Svishtov | 6,517.46 mi (10,488.84 km) |
| Tucson to Targovishte | 6,574.03 mi (10,579.89 km) |
| Tucson to Teteven | 6,524.07 mi (10,499.48 km) |
| Tucson to Troyan | 6,539.51 mi (10,524.33 km) |
| Tucson to Tryavna | 6,563.84 mi (10,563.48 km) |
| Tucson to Tutrakan | 6,529.74 mi (10,508.60 km) |
| Tucson to Varna | 6,614.03 mi (10,644.25 km) |
