| Providence to Smolyan | 4,661.72 mi (7,502.31 km) |
| Providence to Sofia | 4,559.54 mi (7,337.87 km) |
| Providence to Sopot | 4,619.95 mi (7,435.09 km) |
| Providence to Sozopol | 4,749.47 mi (7,643.54 km) |
| Providence to Sredets | 4,732.12 mi (7,615.61 km) |
| Providence to Stamboliyski | 4,632.21 mi (7,454.82 km) |
| Providence to Stara Zagora | 4,665.66 mi (7,508.66 km) |
| Providence to Svilengrad | 4,715.93 mi (7,589.55 km) |
| Providence to Svishtov | 4,604.78 mi (7,410.68 km) |
| Providence to Targovishte | 4,669.55 mi (7,514.91 km) |
| Providence to Teteven | 4,589.29 mi (7,385.75 km) |
| Providence to Troyan | 4,609.05 mi (7,417.55 km) |
| Providence to Tryavna | 4,641.64 mi (7,469.99 km) |
| Providence to Tutrakan | 4,637.69 mi (7,463.63 km) |
| Providence to Varna | 4,724.28 mi (7,603.00 km) |
