| Upton to Smolyan | 1,518.05 mi (2,443.07 km) |
| Upton to Sofia | 1,414.40 mi (2,276.26 km) |
| Upton to Sopot | 1,471.68 mi (2,368.44 km) |
| Upton to Sozopol | 1,597.95 mi (2,571.66 km) |
| Upton to Sredets | 1,581.07 mi (2,544.48 km) |
| Upton to Stamboliyski | 1,486.44 mi (2,392.20 km) |
| Upton to Stara Zagora | 1,516.44 mi (2,440.47 km) |
| Upton to Svilengrad | 1,567.75 mi (2,523.04 km) |
| Upton to Svishtov | 1,453.41 mi (2,339.04 km) |
| Upton to Targovishte | 1,517.85 mi (2,442.74 km) |
| Upton to Teteven | 1,441.06 mi (2,319.15 km) |
| Upton to Troyan | 1,460.09 mi (2,349.78 km) |
| Upton to Tryavna | 1,491.50 mi (2,400.34 km) |
| Upton to Tutrakan | 1,485.87 mi (2,391.28 km) |
| Upton to Varna | 1,572.42 mi (2,530.56 km) |
