| Gresham to Smolyan | 6,087.63 mi (9,797.09 km) |
| Gresham to Sofia | 5,989.30 mi (9,638.84 km) |
| Gresham to Sopot | 6,020.44 mi (9,688.96 km) |
| Gresham to Sozopol | 6,090.23 mi (9,801.28 km) |
| Gresham to Sredets | 6,085.57 mi (9,793.77 km) |
| Gresham to Stamboliyski | 6,049.23 mi (9,735.29 km) |
| Gresham to Stara Zagora | 6,051.52 mi (9,738.98 km) |
| Gresham to Svilengrad | 6,104.72 mi (9,824.60 km) |
| Gresham to Svishtov | 5,970.00 mi (9,607.78 km) |
| Gresham to Targovishte | 6,016.31 mi (9,682.32 km) |
| Gresham to Teteven | 5,994.03 mi (9,646.46 km) |
| Gresham to Troyan | 6,004.89 mi (9,663.93 km) |
| Gresham to Tryavna | 6,020.87 mi (9,689.66 km) |
| Gresham to Tutrakan | 5,965.37 mi (9,600.34 km) |
| Gresham to Varna | 6,042.23 mi (9,724.03 km) |
